Cyanosilylation of ketones catalyzed by quaternary ammonium salt and N-oxide

Synlett

Volumn , Issue 6, 2004, Pages 1077-1079

  Zhou, Hui ^a   Chen, Fu Xue ^a   Qin, Bo ^a   Feng, Xiaoming ^a   Zhang, Guolin ^b  

^a SICHUAN UNIVERSITY   (China)

^b CHENGDU INSTITUTE OF BIOLOGY   (China)

Author keywords

Cyanohydrins; Ketones; N oxides; Organocatalysis; Quaternary ammonium salts

Indexed keywords

AMMONIA; KETONE; OXIDE;

ARTICLE; CATALYSIS; CATALYST; CHIRALITY; CYANATION; ENANTIOSELECTIVITY; MOLECULAR MECHANICS; SILYLATION; SYNTHESIS;

EID: 3142749638     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2004-820045     Document Type: Article

References (41)

1. (a) Gregory, R. J. H. Chem. Rev. 1999, 99, 3649.
2. (b) North, M. Tetrahedron: Asymmetry 2003, 14, 147.
3. Groutas, W. C.; Felker, D. Synthesis 1980, 861.
4. (a) Chen, F.-X.; Feng, X.-M.; Qin, B.; Zhang, G.-L.; Jiang, Y.-Z. Synlett 2003, 558.
5. (b) Shen, Y.-C.; Feng, X.-M.; Li, Y.; Zhang, G.-L.; Jiang, Y.-Z. Synlett 2002, 793.
6. (c) Shen, Y.-C.; Feng, X.-M.; Li, Y.; Zhang, G.-L.; Jiang, Y.-Z. Tetrahedron 2003, 59, 5667.
7. (d) Bian, Z.-X.; Zhao, H.-Y.; Li, B.-G. Polyhedron 2003, 22, 1523.
8. (e) Yadav, J. S.; Reddy, B. V. S.; Reddy, M. S.; Prasad, A. R. Tetrahedron Lett. 2002, 42, 9703.
9. (f) Singh, V. K.; Saravanan, P.; Vijaya Anand, R. Tetrahedron Lett. 1998, 39, 3823.
10. (g) Wilkinson, H. S.; Grover, P. T.; Vandenbossche, C. P.; Bakale, R. P.; Bhongle, N. N.; Wald, S. A.; Senanayake, C. H. Org. Lett. 2001, 3, 553.
11. (h) Bandini, M.; Cozzi, P. G.; Melchiorre, P.; Umani-Ronchi, A. Tetrahedron Lett. 2001, 42, 3041; and references cited therein.
12. (a) Hamashima, Y.; Sawada, D.; Kanai, M.; Shibasaki, M. J. Am. Chem. Soc. 1999, 121, 2641.
13. (b) Hamsahima, Y.; Kanai, M.; Shibasaki, M. J. Am. Chem. Soc. 2000, 122, 7412.
14. (c) Yabu, K.; Masumoto, S.; Yamasaki, S.; Hamashima, Y.; Kanai, M.; Du, W.; Curran, D. P.; Shibasaki, M. J. Am. Chem. Soc. 2001, 123, 9908.
15. (d) Hamashima, Y.; Kanai, M.; Shibasaki, M. Tetrahedron Lett. 2001, 42, 691.
16. (e) Yabu, K.; Masumoto, S.; Kanai, M.; Curran, D. P.; Shibasaki, M. Tetrahedron Lett. 2002, 43, 2923.
17. (f) Deng, H.; Isler, M. P.; Snapper, M. L.; Hoveyda, A. H. Angew. Chem. Int. Ed. 2002, 41, 1009.
18. (g) Casas, J.; Nájera, C.; Sansano, J. M.; Saá, J. M. Org. Lett. 2002, 4, 2589.
19. (h) Chen, F.-X.; Feng, X.-M.; Qin, B.; Zhang, G.-L.; Jiang, Y.-Z. Org. Lett. 2003, 5, 949.
20. (i) Shen, Y.-C.; Feng, X.-M.; Zhang, G.-L.; Jiang, Y.-Z. Synlett 2002, 1353.
21. (j) Shen, Y.-C.; Feng, X.-M.; Li, Y.; Zhang, G.-L.; Jiang, Y.-Z. Eur. J. Org. Chem. 2004, 129; and references cited therein.
22. Fubini, B.; Aréan, C. O. Chem. Soc. Rev. 1999, 28, 373.
23. (a) Dalko, P. I.; Moisan, L. Angew. Chem. Int. Ed. 2001, 40, 3726.
24. (b) Schreiner, P. R. Chem. Soc. Rev. 2003, 32, 289.
25. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
26. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
27. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
28. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
29. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
30. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
31. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
32. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
33. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
34. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
35. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
36. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
37. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
38. Recent studies in organocatalysis: (a) Pidathala, C.; Hoang, L.; Vignola, N.; List, B. Angew. Chem. Int. Ed. 2003, 42, 2785. (b) Juhl, K.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 1498. (c) Hayashi, Y.; Tsuboi, W.; Ashimine, I.; Urushima, T.; Shoji, M.; Sakai, K. Angew. Chem. Int. Ed. 2003, 42, 3677. (d) Halland, N.; Aburel, P. S.; Jørgensen, K. A. Angew. Chem. Int. Ed. 2003, 42, 661. (e) Hoang, L.; Bahmanyar, S.; Houk, K. N.; List, B. J. Am. Chem. Soc. 2003, 125, 16. (f) Bahmanyar, S.; Houk, K. N.; Martin, H. J.; List, B. J. Am. Chem. Soc. 2003, 125, 2475. (g) Melchiorre, P.; Jørgensen, K. A. J. Org. Chem. 2003, 68, 4151. (h) Chowdari, N. S.; Ramachary, D. B.; Barbas, C. F. III Org. Lett. 2003, 5, 1685. (i) Bahmanyar, S.; Houk, K. N. Org. Lett. 2003, 5, 1249. (j) Córdova, A.; Barbas, C. F. III Tetrahedron Lett. 2003, 44, 1923. (k) Liu, H.; Peng, L.; Zhang, T.; Li, Y. New J. Chem. 2003, 27, 1159. (l) Zhong, G. Angew. Chem. Int. Ed. 2003, 42, 4247. (m) Ramachary, D. B.; Chowdari, N. S.; Barbas, C. F. III Angew. Chem. Int. Ed. 2003, 42, 4233. (n) Hayashi, Y.; Tsuboi, W.; Shoji, M.; Suzuki, N. J. Am. Chem. Soc. 2003, 125, 11208.
39. (a) Tian, S.-K.; Deng, L. J. Am. Chem. Soc. 2001, 123, 6195.
40. (b) Tian, S.-K.; Hong, R.; Deng, L. J. Am. Chem. Soc. 2003, 125, 9900.
41. 2O-petroleum ether (1:100) as the eluent.