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0037017030
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3-impregnated zeolite catalysts in radical acylation of aromatics, see: a) V. R. Choudhary, S. K. Jana, N. S. Patil, Tetrahedron Lett. 2002, 43, 1105-1107; b) V. R. Choudhary, S. K. Jana, N. S. Patil, S. K. Bhargava, Micropor. Mesopor. Mater. 2003, 57, 21-35.
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Choudhary, V.R.1
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0037413239
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3-impregnated zeolite catalysts in radical acylation of aromatics, see: a) V. R. Choudhary, S. K. Jana, N. S. Patil, Tetrahedron Lett. 2002, 43, 1105-1107; b) V. R. Choudhary, S. K. Jana, N. S. Patil, S. K. Bhargava, Micropor. Mesopor. Mater. 2003, 57, 21-35.
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Choudhary, V.R.1
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17
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2542481348
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EP was calculated as: (In content x 3)/proton exchange capacity (≅ 4.7 mmol/g)
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EP was calculated as: (In content x 3)/proton exchange capacity (≅ 4.7 mmol/g).
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18
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0037178507
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M. Bandini, P. G. Cozzi, P. Melchiorre, A. Umani-Ronchi, J. Org. Chem. 2002, 67, 5386-5389.
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19
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0344443340
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Enantiomerically pure epoxides are valuable electrophiles for the synthesis of key synthetic building blocks, see: a) A. B. Smith III, S. M. Pitram, A. M. Boldi, M. J. Gaunt, C. Sfouggatakis, W. H. Moser, J. Am. Chem. Soc. 2003, 125, 14435-14445; b) M. Pastó, B. Rodríguez, A. Riera, M. A. Pericàs, Tetrahedron Lett. 2003, 44, 8369 -8372.
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20
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0141922129
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Enantiomerically pure epoxides are valuable electrophiles for the synthesis of key synthetic building blocks, see: a) A. B. Smith III, S. M. Pitram, A. M. Boldi, M. J. Gaunt, C. Sfouggatakis, W. H. Moser, J. Am. Chem. Soc. 2003, 125, 14435-14445; b) M. Pastó, B. Rodríguez, A. Riera, M. A. Pericàs, Tetrahedron Lett. 2003, 44, 8369 -8372.
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Pastó, M.1
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21
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0000114630
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4 has been recently used as the key step in the synthesis of tripeptides, see: R. Reddy. J. B. Jaquith, V. R. Neelagiri, S. Saleh-Hanna, T. Durst, Org. Lett. 2002, 4, 695-697.
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For a comprehensive discussion on the morphology of polymer supports in solution, see: D. C. Sherringhton, Chem. Commun. 1998, 2275-2286.
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Sherringhton, D.C.1
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23
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2542439271
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note
-
2O, rt, 24 h) was carried out. Under these optimal conditions the desired β-indolyl alcohol 3aa was isolated only in traces, 1,1-bisindolyl-2-phenylethane being the major reaction product (yield: 85%), derived from the double addition of 2a to phenylacetaldehyde (rearrangement of 1a).
-
-
-
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24
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2542494572
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-
note
-
1st cycle: yield = 53%, ee = 98%; 2nd cycle: yield = 67%, ee = 98%; 3rd cycle: yield = 57%, ee = 98%; 4th cycle: yield = 52%, ee = 96%; 5th cycle: yield = 56%, ee = 96%.
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25
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2542471107
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A. Biffis, R. Ricoveri, S. Campestrini, M. Kralik, K. Jeřàbek, B. Corani, Chem. Eur. J. 2003, 9, 2962-2967.
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Biffis, A.1
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26
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0023228419
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a) J. R. Luly, N. Yi, J. Soderquist, H. Stein, J. Cohen, T. J. Perun, J. J. Plattner, J. Med. Chem. 1987, 30, 1609-1616;
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0142058449
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and references cited therein
-
Lewis acid catalysis: F. Fringuelli, F. Pizzo, S. Tortoioli, L. Vaccaio, J. Org. Chem. 2003, 68, 8248-8251 and references cited therein; basic catalysis: R.-H. Fan, X.-L. Hou, J. Org. Chem. 2003, 68, 726-730; stereoselective: J. Wu, X.-L. Hou, L.-X. Dai, L.-J. Xia, M.-H. Tang, Tetrahedron: Asymmetry 1998, 9, 3431-3436; M. H. Wu, E. N. Jacobsen, J. Org. Chem. 1998, 63, 5252-5254; T. Iida, N. Yamamoto, H. Sasai, M. Shibasaki, J. Am. Chem. Soc. 1997, 119, 4783-4784.
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0037423323
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Lewis acid catalysis: F. Fringuelli, F. Pizzo, S. Tortoioli, L. Vaccaio, J. Org. Chem. 2003, 68, 8248-8251 and references cited therein; basic catalysis: R.-H. Fan, X.-L. Hou, J. Org. Chem. 2003, 68, 726-730; stereoselective: J. Wu, X.-L. Hou, L.-X. Dai, L.-J. Xia, M.-H. Tang, Tetrahedron: Asymmetry 1998, 9, 3431-3436; M. H. Wu, E. N. Jacobsen, J. Org. Chem. 1998, 63, 5252-5254; T. Iida, N. Yamamoto, H. Sasai, M. Shibasaki, J. Am. Chem. Soc. 1997, 119, 4783-4784.
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Fan, R.-H.1
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0032476113
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Lewis acid catalysis: F. Fringuelli, F. Pizzo, S. Tortoioli, L. Vaccaio, J. Org. Chem. 2003, 68, 8248-8251 and references cited therein; basic catalysis: R.-H. Fan, X.-L. Hou, J. Org. Chem. 2003, 68, 726-730; stereoselective: J. Wu, X.-L. Hou, L.-X. Dai, L.-J. Xia, M.-H. Tang, Tetrahedron: Asymmetry 1998, 9, 3431-3436; M. H. Wu, E. N. Jacobsen, J. Org. Chem. 1998, 63, 5252-5254; T. Iida, N. Yamamoto, H. Sasai, M. Shibasaki, J. Am. Chem. Soc. 1997, 119, 4783-4784.
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Wu, J.1
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Tang, M.-H.5
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31
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0001044547
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Lewis acid catalysis: F. Fringuelli, F. Pizzo, S. Tortoioli, L. Vaccaio, J. Org. Chem. 2003, 68, 8248-8251 and references cited therein; basic catalysis: R.-H. Fan, X.-L. Hou, J. Org. Chem. 2003, 68, 726-730; stereoselective: J. Wu, X.-L. Hou, L.-X. Dai, L.-J. Xia, M.-H. Tang, Tetrahedron: Asymmetry 1998, 9, 3431-3436; M. H. Wu, E. N. Jacobsen, J. Org. Chem. 1998, 63, 5252-5254; T. Iida, N. Yamamoto, H. Sasai, M. Shibasaki, J. Am. Chem. Soc. 1997, 119, 4783-4784.
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Wu, M.H.1
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0030984990
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Lewis acid catalysis: F. Fringuelli, F. Pizzo, S. Tortoioli, L. Vaccaio, J. Org. Chem. 2003, 68, 8248-8251 and references cited therein; basic catalysis: R.-H. Fan, X.-L. Hou, J. Org. Chem. 2003, 68, 726-730; stereoselective: J. Wu, X.-L. Hou, L.-X. Dai, L.-J. Xia, M.-H. Tang, Tetrahedron: Asymmetry 1998, 9, 3431-3436; M. H. Wu, E. N. Jacobsen, J. Org. Chem. 1998, 63, 5252-5254; T. Iida, N. Yamamoto, H. Sasai, M. Shibasaki, J. Am. Chem. Soc. 1997, 119, 4783-4784.
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a) F. Fringuelli, F. Pizzo, S. Tortoioli, L. Vaccaro, Adv. Synth. Cat. 2002, 344, 379-384;
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0037078359
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A survey based on the SciFinder database revealed that the ring opening of enantiomerically pure epoxides with sulfur nucleophiles was published only by Tang et al. in the presence of chiral titanium catalysts and a partial racemization of the starting styrene oxide was observed: Z. Li, Z. Zhou, K. Li, L. Wang, Q. Zhou, C. Tang, Tetrahedron Lett. 2002, 43, 7609-7611.
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0028041025
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D: 268 (c, 0.9, EtOH)}, see: A. Toshimitsu, C. Hirosawa. K. Tamao, Tetrahedron 1994, 50, 8997-9008.
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2542469269
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For a discussion on the stereochemistry of the nucleophilic addition of sulfur reagents to limonene oxides, see: V. A. Morgunova, L. E. Nikitina, V. V. Plemenkov, V. V. Klochkov, R. A. Shaikhutdinov, Russ. J. Org. Chem. 1999, 35, 44-47.
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