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Indenes are the major products from coupling of amino(aryl)-carbene-chromium complexes and alkynes. (a) Yamashita, A. Tetrahedron Lett. 1986, 27, 5915-5918. (b) Döta, K. H.; Erben, H. G.; Harms, K. J. Chem. Soc., Chem. Commun. 1980, 692-693.
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Indenes are the major products from coupling of amino(aryl)-carbene-chromium complexes and alkynes. (a) Yamashita, A. Tetrahedron Lett. 1986, 27, 5915-5918. (b) Döta, K. H.; Erben, H. G.; Harms, K. J. Chem. Soc., Chem. Commun. 1980, 692-693.
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Indenes have also been prepared from the coupling of carbene complexes in mechanistically unrelated processes, (a) Barluenga, J.; Martínez, S.; Suárez-Sobrino, A. L.; Tomás, M. J. Am. Chem. Soc. 2001, 123, 11113-11114. (b) Barluenga, J.; Trabanco, A. A.; Florez, J.; Garcia-Granda, S.; LLorca, M. A. J. Am. Chem. Soc. 1998, 120, 12129-12130.
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Examples in the 21st century: (a) Lowe, D. B.; Wickens, P. L.; Ma, X.; Zhang, M.; Bullock, W. H.; Coish, P. D. G.; Mugge, I. A.; Stolle, A.; Wang, M.; Wang, Y.; Zhang, C.; Zhang, H. J.; Zhu, L.; Tsutsumi, M.; Livingston, J. N. PCT Int. Appl. 2003, Chem. Abstr. 2003, 138, 153524. (b) Uchikawa, O.; Fukatsu, K.; Tokunoh, R.; Kawada, M.; Matsumoto, K.; Imai, Y.; Hinuma, S.; Kato, K.; Nishikawa, H.; Hirai, K.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4222-4239. (c) Fukatsu, K.; Uchikawa, O.; Kawada, M.; Yamano, T.; Yamashita, M. ; Kato, K.; Hirai, K.; Hinuma, S.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4212-4221. (d) Menander, K. B.; Mayle, M. J. PCT Int. Appl. 2000, Chem. Abstr. 2000, 133, 144943.
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Lowe, D.B.1
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Bullock, W.H.5
Coish, P.D.G.6
Mugge, I.A.7
Stolle, A.8
Wang, M.9
Wang, Y.10
Zhang, C.11
Zhang, H.J.12
Zhu, L.13
Tsutsumi, M.14
Livingston, J.N.15
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14
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0037068471
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Examples in the 21st century: (a) Lowe, D. B.; Wickens, P. L.; Ma, X.; Zhang, M.; Bullock, W. H.; Coish, P. D. G.; Mugge, I. A.; Stolle, A.; Wang, M.; Wang, Y.; Zhang, C.; Zhang, H. J.; Zhu, L.; Tsutsumi, M.; Livingston, J. N. PCT Int. Appl. 2003, Chem. Abstr. 2003, 138, 153524. (b) Uchikawa, O.; Fukatsu, K.; Tokunoh, R.; Kawada, M.; Matsumoto, K.; Imai, Y.; Hinuma, S.; Kato, K.; Nishikawa, H.; Hirai, K.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4222-4239. (c) Fukatsu, K.; Uchikawa, O.; Kawada, M.; Yamano, T.; Yamashita, M. ; Kato, K.; Hirai, K.; Hinuma, S.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4212-4221. (d) Menander, K. B.; Mayle, M. J. PCT Int. Appl. 2000, Chem. Abstr. 2000, 133, 144943.
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Uchikawa, O.1
Fukatsu, K.2
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Kawada, M.4
Matsumoto, K.5
Imai, Y.6
Hinuma, S.7
Kato, K.8
Nishikawa, H.9
Hirai, K.10
Miyamoto, M.11
Ohkawa, S.12
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15
-
-
0037068497
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-
Examples in the 21st century: (a) Lowe, D. B.; Wickens, P. L.; Ma, X.; Zhang, M.; Bullock, W. H.; Coish, P. D. G.; Mugge, I. A.; Stolle, A.; Wang, M.; Wang, Y.; Zhang, C.; Zhang, H. J.; Zhu, L.; Tsutsumi, M.; Livingston, J. N. PCT Int. Appl. 2003, Chem. Abstr. 2003, 138, 153524. (b) Uchikawa, O.; Fukatsu, K.; Tokunoh, R.; Kawada, M.; Matsumoto, K.; Imai, Y.; Hinuma, S.; Kato, K.; Nishikawa, H.; Hirai, K.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4222-4239. (c) Fukatsu, K.; Uchikawa, O.; Kawada, M.; Yamano, T.; Yamashita, M. ; Kato, K.; Hirai, K.; Hinuma, S.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4212-4221. (d) Menander, K. B.; Mayle, M. J. PCT Int. Appl. 2000, Chem. Abstr. 2000, 133, 144943.
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Fukatsu, K.1
Uchikawa, O.2
Kawada, M.3
Yamano, T.4
Yamashita, M.5
Kato, K.6
Hirai, K.7
Hinuma, S.8
Miyamoto, M.9
Ohkawa, S.10
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16
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1842622635
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PCT Int. Appl. 2000
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Examples in the 21st century: (a) Lowe, D. B.; Wickens, P. L.; Ma, X.; Zhang, M.; Bullock, W. H.; Coish, P. D. G.; Mugge, I. A.; Stolle, A.; Wang, M.; Wang, Y.; Zhang, C.; Zhang, H. J.; Zhu, L.; Tsutsumi, M.; Livingston, J. N. PCT Int. Appl. 2003, Chem. Abstr. 2003, 138, 153524. (b) Uchikawa, O.; Fukatsu, K.; Tokunoh, R.; Kawada, M.; Matsumoto, K.; Imai, Y.; Hinuma, S.; Kato, K.; Nishikawa, H.; Hirai, K.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4222-4239. (c) Fukatsu, K.; Uchikawa, O.; Kawada, M.; Yamano, T.; Yamashita, M. ; Kato, K.; Hirai, K.; Hinuma, S.; Miyamoto, M.; Ohkawa, S. J. Med. Chem. 2002, 45, 4212-4221. (d) Menander, K. B.; Mayle, M. J. PCT Int. Appl. 2000, Chem. Abstr. 2000, 133, 144943.
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Menander, K.B.1
Mayle, M.J.2
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18
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0000731325
-
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This effect is dramatically illustrated in the following papers: (a) Grotjahn, D. B.; Kroll, F. E. K.; Schaefer, T.; Harms, K.; Dötz, K. H. Organometallics 1992, 11, 298-310. (b) Hoye, T. R.; Rehberg, G. M. Organometallics 1989, 8, 2070-2071, (c) Korkowski, P. F.; Hoye, T. R.; Rydberg, D. B. J. Am. Chem. Soc. 1988, 110, 2676-2678.
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Schaefer, T.3
Harms, K.4
Dötz, K.H.5
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19
-
-
0038221244
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-
This effect is dramatically illustrated in the following papers: (a) Grotjahn, D. B.; Kroll, F. E. K.; Schaefer, T.; Harms, K.; Dötz, K. H. Organometallics 1992, 11, 298-310. (b) Hoye, T. R.; Rehberg, G. M. Organometallics 1989, 8, 2070-2071, (c) Korkowski, P. F.; Hoye, T. R.; Rydberg, D. B. J. Am. Chem. Soc. 1988, 110, 2676-2678.
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Hoye, T.R.1
Rehberg, G.M.2
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20
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0000436289
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This effect is dramatically illustrated in the following papers: (a) Grotjahn, D. B.; Kroll, F. E. K.; Schaefer, T.; Harms, K.; Dötz, K. H. Organometallics 1992, 11, 298-310. (b) Hoye, T. R.; Rehberg, G. M. Organometallics 1989, 8, 2070-2071, (c) Korkowski, P. F.; Hoye, T. R.; Rydberg, D. B. J. Am. Chem. Soc. 1988, 110, 2676-2678.
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Korkowski, P.F.1
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Rydberg, D.B.3
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21
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0033554010
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Additional factors may influence benzannulation vs cyclopentannulation since the regioselectivity of alkyne insertion is different for the two processes. Waters, M. L.; Bos, M. E.; Wulff, W. D. J. Am. Chem. Soc. 1999, 121, 6403-6413.
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For recent uses of phenoxycarbene complexes see: Waters, M. L.; Brandvold, T. A.; Isaacs, L.; Wulff, W. D.; Rheingold, A. L. Organometallics 1998, 17, 4298-4308.
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25
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84982335862
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Formation of ring-opened products from similar carbocation intermediates can proceed with variable degrees of ring opening, (a) For an example where the degree of ring opening is controlled through reaction conditions see: Sarel, S. ; Breuer, E.; Ertag, S.; Salamon, R. Isr. J. Chem. 1963, 1, 451-459. (b) For an example involving only ring opening see: Kanemoto, S.; Shimizu, M.; Yoshioka, H. Bull. Chem. Soc. Jpn. 1989, 62, 2024-2031. (c) For examples involving no ring opening see: Traas, P. C.; Boelens, H.; Takken, H. J. Rec. Trav. Chim. 1976, 95, 57-66.
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26
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0343843670
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Formation of ring-opened products from similar carbocation intermediates can proceed with variable degrees of ring opening, (a) For an example where the degree of ring opening is controlled through reaction conditions see: Sarel, S. ; Breuer, E.; Ertag, S.; Salamon, R. Isr. J. Chem. 1963, 1, 451-459. (b) For an example involving only ring opening see: Kanemoto, S.; Shimizu, M.; Yoshioka, H. Bull. Chem. Soc. Jpn. 1989, 62, 2024-2031. (c) For examples involving no ring opening see: Traas, P. C.; Boelens, H.; Takken, H. J. Rec. Trav. Chim. 1976, 95, 57-66.
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27
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84906571729
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Formation of ring-opened products from similar carbocation intermediates can proceed with variable degrees of ring opening, (a) For an example where the degree of ring opening is controlled through reaction conditions see: Sarel, S. ; Breuer, E.; Ertag, S.; Salamon, R. Isr. J. Chem. 1963, 1, 451-459. (b) For an example involving only ring opening see: Kanemoto, S.; Shimizu, M.; Yoshioka, H. Bull. Chem. Soc. Jpn. 1989, 62, 2024-2031. (c) For examples involving no ring opening see: Traas, P. C.; Boelens, H.; Takken, H. J. Rec. Trav. Chim. 1976, 95, 57-66.
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Indene double-bond isomerization can be catalyzed by base or thermolysis, (a) For thermal interconveraion, see: Roth, W. R. Tetrahedron Lett. 1964, 1009-1013. (b) For base-catalyzed rearrangement, see: Bergson, J.; Weidler, A. M. Acta Chim. Scand. 1964, 18, 1487-1497.
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Roth, W.R.1
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0010609019
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Indene double-bond isomerization can be catalyzed by base or thermolysis, (a) For thermal interconveraion, see: Roth, W. R. Tetrahedron Lett. 1964, 1009-1013. (b) For base-catalyzed rearrangement, see: Bergson, J.; Weidler, A. M. Acta Chim. Scand. 1964, 18, 1487-1497.
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(b) Acid-catalyzed isomerization of 16j might have occurred because of the intermediacy of cyclopropylcarbinyl cation intermediates. Richey, H. G., Jr. In Carbonium Ions; Olah, G. A., Schleyer, P. von R., Eds.; Wiley-Interscience: New York, 1972; Vol. 3, pp 1201-1294.
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1842570505
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Obtained from an MM2 calculation using CHEM 3D
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Obtained from an MM2 calculation using CHEM 3D.
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33
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49649142657
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0000023285
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(a) A similar stabilization was suggested to explain the unique regioselectivity exhibited in the coupling of stannylacetylenes and chromium carbene complexes. Although this effect was more strongly noted for tin than for silicon, it is still important for silicon; TMS is much larger than propyl, yet propyl ends up α to OH in the major product of benzannulations using pentynyltrimethylsilane. Chamberlin, S.; Waters, M. L.; Wulff, W. D. J. Am. Chem. Soc. 1994, 116, 3113-3114.
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