-
1
-
-
0342496920
-
-
Fellow of the Alfred P. Sloan Foundation, 1994-1996
-
Fellow of the Alfred P. Sloan Foundation, 1994-1996.
-
-
-
-
2
-
-
0343366442
-
-
We stress that the term "ene reaction" is used throughout this discussion only to describe the general structure of the products. No mechanistic inferences should be drawn from this usage
-
We stress that the term "ene reaction" is used throughout this discussion only to describe the general structure of the products. No mechanistic inferences should be drawn from this usage.
-
-
-
-
3
-
-
0342496914
-
-
Trost, B. M.; Fleming, I., Eds.; Pergamon Press: London, Springer-Verlag: Berlin, Germany
-
For outstanding reviews see: (a) Snider, B. B., in: Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: London, Springer-Verlag: Berlin, Germany, 1986;
-
(1986)
Comprehensive Organic Synthesis
-
-
Snider, B.B.1
-
5
-
-
0342496919
-
-
Unusually reactive carbonyl compounds may undergo ene reaction in a strictly thermal mode (a) Klimova, E. I.; Antonova, N. D.; Arbuzov, Y. A. J. Org. Chem. USSR (Engl. Transl.) 1969, 5, 1312;
-
(1969)
J. Org. Chem. USSR (Engl. Transl.)
, vol.5
, pp. 1312
-
-
Klimova, E.I.1
Antonova, N.D.2
Arbuzov, Y.A.3
-
7
-
-
0025330437
-
-
lanthanide catalysis
-
A number of intramolecular ene reactions may be carried out in truly catalytic mode: (a) Ziegler, F. E.; Sobolov, S. B. J. Am. Chem. Soc. 1990, 112, 2749 (lanthanide catalysis);
-
(1990)
J. Am. Chem. Soc.
, vol.112
, pp. 2749
-
-
Ziegler, F.E.1
Sobolov, S.B.2
-
8
-
-
0026554484
-
-
(b) Gu, J. H.; Terada, M.; Mikami, K.; Nakai, T. Tetrahedron Lett. 1992, 33, 1465;
-
(1992)
Tetrahedron Lett.
, vol.33
, pp. 1465
-
-
Gu, J.H.1
Terada, M.2
Mikami, K.3
Nakai, T.4
-
10
-
-
33751499216
-
-
(d) Mikami, K.; Terada, M.; Nakai, T. J. Org. Chem. 1991, 56, 5456. Recent example of intramolecural ene reaction (requires stoichiometric promoter): Snider, B. B.; Vo, N. H.; O'Neil S. V.; Foxman, B. M. J. Am. Chem. Soc. 1996, 118, 7644.
-
(1991)
J. Org. Chem.
, vol.56
, pp. 5456
-
-
Mikami, K.1
Terada, M.2
Nakai, T.3
-
11
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-
0029764831
-
-
(d) Mikami, K.; Terada, M.; Nakai, T. J. Org. Chem. 1991, 56, 5456. Recent example of intramolecural ene reaction (requires stoichiometric promoter): Snider, B. B.; Vo, N. H.; O'Neil S. V.; Foxman, B. M. J. Am. Chem. Soc. 1996, 118, 7644.
-
(1996)
J. Am. Chem. Soc.
, vol.118
, pp. 7644
-
-
Snider, B.B.1
Vo, N.H.2
O'Neil, S.V.3
Foxman, B.M.4
-
14
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0019928219
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-
(c) Snider, B. B.; Rodini, D. J.; Kirk, T. C.; Cordova, R. J. Am. Chem. Soc. 1982, 104, 555.
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(1982)
J. Am. Chem. Soc.
, vol.104
, pp. 555
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Snider, B.B.1
Rodini, D.J.2
Kirk, T.C.3
Cordova, R.4
-
15
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-
0001449676
-
-
(a) Reese, C. B.; Saffhill, R.; Sulston, J. E. J. Am. Chem. Soc. 1967, 89, 3366;
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(1967)
J. Am. Chem. Soc.
, vol.89
, pp. 3366
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-
Reese, C.B.1
Saffhill, R.2
Sulston, J.E.3
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18
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0041437184
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-
(d) Kitizawa, E.; Imamura, T.; Saigo, K.; Mukaiyama, T. Chem. Lett. 1975, 569.
-
(1975)
Chem. Lett.
, pp. 569
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Kitizawa, E.1
Imamura, T.2
Saigo, K.3
Mukaiyama, T.4
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21
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0027521947
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Shoda, H.; Nakamura, T.; Tanino, K.; Kuwajima, I. Tetrahedron Lett. 1993, 34, 6281.
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(1993)
Tetrahedron Lett.
, vol.34
, pp. 6281
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-
Shoda, H.1
Nakamura, T.2
Tanino, K.3
Kuwajima, I.4
-
22
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0025217978
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(a) Tanino, K.; Nakamura, T.; Kuwajima, I. Tetrahedron Lett. 1990, 31, 2165;
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(1990)
Tetrahedron Lett.
, vol.31
, pp. 2165
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Tanino, K.1
Nakamura, T.2
Kuwajima, I.3
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23
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0028080269
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(b) Masuya, K.; Tanino, K.; Kuwajima, I. Tetrahedron Lett. 1994, 35, 7965;
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(1994)
Tetrahedron Lett.
, vol.35
, pp. 7965
-
-
Masuya, K.1
Tanino, K.2
Kuwajima, I.3
-
24
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0027396381
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(c) Nakamura, T.; Tanino, K.; Kuwajima, I. Tetrahedron Lett. 1993, 34, 477;
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(1993)
Tetrahedron Lett.
, vol.34
, pp. 477
-
-
Nakamura, T.1
Tanino, K.2
Kuwajima, I.3
-
25
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0026596075
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(d) Tanino, K.; Shoda, H.; Nakamura, T.; Kuwajima, I. Tetrahedron Lett. 1992, 33, 1337.
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(1992)
Tetrahedron Lett.
, vol.33
, pp. 1337
-
-
Tanino, K.1
Shoda, H.2
Nakamura, T.3
Kuwajima, I.4
-
26
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-
0025848983
-
-
Truly catalytic aldol reactions proper are known, though in their current form they have limited scope. (a) Hayashi, T.; Uozumi, Y.; Yamazaki, A. Tetrahedron Lett. 1991, 32, 2799;
-
(1991)
Tetrahedron Lett.
, vol.32
, pp. 2799
-
-
Hayashi, T.1
Uozumi, Y.2
Yamazaki, A.3
-
27
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-
33845376099
-
-
(b) Ito, Y.; Sawamura, M.; Hayashi, T. J. Am. Chem. Soc. 1986, 108, 6405.
-
(1986)
J. Am. Chem. Soc.
, vol.108
, pp. 6405
-
-
Ito, Y.1
Sawamura, M.2
Hayashi, T.3
-
28
-
-
0000524226
-
-
As defined operationally by Bertz, S. J. Am. Chem. Soc. 1981, 103, 3599.
-
(1981)
J. Am. Chem. Soc.
, vol.103
, pp. 3599
-
-
Bertz, S.1
-
32
-
-
0342496907
-
-
note
-
6 for NMR work. This sensitivity also causes the TLC traces of spectroscopically pure ene products to display several spots, corresponding to substances arising through various modes of acid-promoted decomposition.
-
-
-
-
35
-
-
0001641239
-
-
Wilkinson, G., Ed.; Pergamon Press: Oxford, UK, ch. 39. See esp.
-
Cf.Hart, F. A., in: Comprehensive Coordination Chemistry; Wilkinson, G., Ed.; Pergamon Press: Oxford, UK, 1987; vol. 3, ch. 39. See esp. pp. 1068 ff.
-
(1987)
Comprehensive Coordination Chemistry
, vol.3
, pp. 1068
-
-
Hart, F.A.1
-
36
-
-
0342496906
-
-
Materials such as ethyl vinyl ether or 1-ethoxypropene, wherein this condition is not satisfied, do not undergo the reaction, and the substrate aldehyde is recovered unchanged.
-
Materials such as ethyl vinyl ether or 1-ethoxypropene, wherein this condition is not satisfied, do not undergo the reaction, and the substrate aldehyde is recovered unchanged.
-
-
-
-
37
-
-
0001924336
-
-
Cf. Evans, D. A.; Nelson, J. V.; Taber, T. R. Top. Stereochem. 1982, 13, 1.
-
(1982)
Top. Stereochem.
, vol.13
, pp. 1
-
-
Evans, D.A.1
Nelson, J.V.2
Taber, T.R.3
-
38
-
-
0006436536
-
-
Pearson, W. H., Ed.; JAI Press: Greenwich, CT, p. 1 ff
-
Discussion: Ciufolini, M. A., in: Advances in Heterocyclic Natural Product Synthesis; Pearson, W. H., Ed.; JAI Press: Greenwich, CT, 1996; vol. 3, p. 1 ff.
-
(1996)
Advances in Heterocyclic Natural Product Synthesis
, vol.3
-
-
Ciufolini, M.A.1
-
40
-
-
0000778829
-
-
See also Prof. Carreira's paper in this issue
-
Carreira, E.; Lee, W.; Singer, R. A. J. Am. Chem. Soc. 1995, 117, 3649. See also Prof. Carreira's paper in this issue.
-
(1995)
J. Am. Chem. Soc.
, vol.117
, pp. 3649
-
-
Carreira, E.1
Lee, W.2
Singer, R.A.3
-
41
-
-
0343802150
-
-
We thank Prof. Carreira for stimulating discussion
-
We thank Prof. Carreira for stimulating discussion.
-
-
-
-
42
-
-
0017288513
-
-
E.g. antitumor agents (jatrophone: Kupchan, S. M.; Siegel, C. W.; Matz, M. J.; Gilmore, C. J.; Bryan, R. F. J. Am. Chem. Soc. 1976, 98, 2295; eremantholide: Le Quesne, P. W.; Levery, S. B.; Menachery, M. D.; Brennan, T. F.; Raffauf, R. F. J. Chem. Soc., Perkin Trans. 1, 1978, 1572); antiparasitic agents (avermectins and ivermectins: Albers-Schönberg, G.; Arison, B. H.; Chabala, J. C.; Douglas, A. W.; Eskola, P.; Fisher, M. H.; Lusi, A.; Mrozik, H.; Smith, J. L.; Tolman, R. L. J. Am. Chem. Soc. 1981, 103, 4216), etc.
-
(1976)
J. Am. Chem. Soc.
, vol.98
, pp. 2295
-
-
Kupchan, S.M.1
Siegel, C.W.2
Matz, M.J.3
Gilmore, C.J.4
Bryan, R.F.5
-
43
-
-
0345434935
-
-
E.g. antitumor agents (jatrophone: Kupchan, S. M.; Siegel, C. W.; Matz, M. J.; Gilmore, C. J.; Bryan, R. F. J. Am. Chem. Soc. 1976, 98, 2295; eremantholide: Le Quesne, P. W.; Levery, S. B.; Menachery, M. D.; Brennan, T. F.; Raffauf, R. F. J. Chem. Soc., Perkin Trans. 1, 1978, 1572); antiparasitic agents (avermectins and ivermectins: Albers-Schönberg, G.; Arison, B. H.; Chabala, J. C.; Douglas, A. W.; Eskola, P.; Fisher, M. H.; Lusi, A.; Mrozik, H.; Smith, J. L.; Tolman, R. L. J. Am. Chem. Soc. 1981, 103, 4216), etc.
-
(1978)
J. Chem. Soc., Perkin Trans.
, vol.1
, pp. 1572
-
-
Le Quesne, P.W.1
Levery, S.B.2
Menachery, M.D.3
Brennan, T.F.4
Raffauf, R.F.5
-
44
-
-
0019805670
-
-
etc.
-
E.g. antitumor agents (jatrophone: Kupchan, S. M.; Siegel, C. W.; Matz, M. J.; Gilmore, C. J.; Bryan, R. F. J. Am. Chem. Soc. 1976, 98, 2295; eremantholide: Le Quesne, P. W.; Levery, S. B.; Menachery, M. D.; Brennan, T. F.; Raffauf, R. F. J. Chem. Soc., Perkin Trans. 1, 1978, 1572); antiparasitic agents (avermectins and ivermectins: Albers-Schönberg, G.; Arison, B. H.; Chabala, J. C.; Douglas, A. W.; Eskola, P.; Fisher, M. H.; Lusi, A.; Mrozik, H.; Smith, J. L.; Tolman, R. L. J. Am. Chem. Soc. 1981, 103, 4216), etc.
-
(1981)
J. Am. Chem. Soc.
, vol.103
, pp. 4216
-
-
Albers-Schönberg, G.1
Arison, B.H.2
Chabala, J.C.3
Douglas, A.W.4
Eskola, P.5
Fisher, M.H.6
Lusi, A.7
Mrozik, H.8
Smith, J.L.9
Tolman, R.L.10
-
45
-
-
0342931115
-
-
For the synthesis of specific 3-furanone derivatives see: (a) Sher, F.; Isidor, J. L.; Taneja, H. R.; Carlson, R. M. Tetrahedron Lett. 1973, 577;
-
(1973)
Tetrahedron Lett.
, pp. 577
-
-
Sher, F.1
Isidor, J.L.2
Taneja, H.R.3
Carlson, R.M.4
-
48
-
-
0016798515
-
-
(d) Gupta, P. K.; Jones, J. G.; Caspi, E. J. Org. Chem. 1975, 40, 1420.
-
(1975)
J. Org. Chem.
, vol.40
, pp. 1420
-
-
Gupta, P.K.1
Jones, J.G.2
Caspi, E.3
-
49
-
-
0001039697
-
-
Smith, A. B., III; Levenberg, P. A.; Jerris, P. J.; Scarborough, R. M.; Wovkulich, P. M. J. Am. Chem. Soc. 1981, 103, 1501.
-
(1981)
J. Am. Chem. Soc.
, vol.103
, pp. 1501
-
-
Smith A.B. III1
Levenberg, P.A.2
Jerris, P.J.3
Scarborough, R.M.4
Wovkulich, P.M.5
-
50
-
-
0342931113
-
-
The stereochemistry of these materials was determined by NOEDS
-
The stereochemistry of these materials was determined by NOEDS.
-
-
-
-
57
-
-
0029870160
-
-
(b) Martin, S. F.; Chen, H. J.; Courtney, A. K.; Liao, Y. S.; Patzel, M.; Ramser, M. N.; Wagman, A. S. Tetrahedron 1996, 52, 7251.
-
(1996)
Tetrahedron
, vol.52
, pp. 7251
-
-
Martin, S.F.1
Chen, H.J.2
Courtney, A.K.3
Liao, Y.S.4
Patzel, M.5
Ramser, M.N.6
Wagman, A.S.7
-
58
-
-
0030900077
-
-
Ciufolini, M. A.; Chen, M.; Lovett, D. P.; Deaton, M. V. Tetrahedron Lett. 1997, 38, 4355.
-
(1997)
Tetrahedron Lett.
, vol.38
, pp. 4355
-
-
Ciufolini, M.A.1
Chen, M.2
Lovett, D.P.3
Deaton, M.V.4
-
59
-
-
0025183188
-
-
It is likely that this is caused by ambient light
-
Triazolines are often unstable and may spontaneously form aziridines: cf. Morimoto, Y.; Matsuda, F.; Shirahama, H. Tetrahedron Lett. 1990, 31, 6031. It is likely that this is caused by ambient light:
-
(1990)
Tetrahedron Lett.
, vol.31
, pp. 6031
-
-
Morimoto, Y.1
Matsuda, F.2
Shirahama, H.3
-
60
-
-
0023483224
-
-
Recent reviews covering isolation, bioactivity and synthetic work in this area: (a) Honda, A.; Mori, Y.; Iguchi, K.; Yamada, Y. Molec. Pharm. 1987, 32, 530;
-
(1987)
Molec. Pharm.
, vol.32
, pp. 530
-
-
Honda, A.1
Mori, Y.2
Iguchi, K.3
Yamada, Y.4
-
61
-
-
0001422419
-
-
(b) Miftakov, M. C.; Adler, M. E.; Akbutnya, F. A.; Tosltikov, G. A. Usp. Khim. 1994, 63, 543;
-
(1994)
Usp. Khim.
, vol.63
, pp. 543
-
-
Miftakov, M.C.1
Adler, M.E.2
Akbutnya, F.A.3
Tosltikov, G.A.4
-
62
-
-
0029036658
-
-
(c) Zhu, J.; Yang, J.-Y.; Klunder, J. H.; Liu, Z.-Y.; Zwanenburg, B. Tetrahedron 1995, 51, 5847.
-
(1995)
Tetrahedron
, vol.51
, pp. 5847
-
-
Zhu, J.1
Yang, J.-Y.2
Klunder, J.H.3
Liu, Z.-Y.4
Zwanenburg, B.5
-
63
-
-
33845281217
-
-
(a) Tsang, R.; Dickson, J. K., Jr.; Pak, H.; Walton, R.; Fraser Reid, B. J. Am. Chem. Soc. 1987, 109, 3484;
-
(1987)
J. Am. Chem. Soc.
, vol.109
, pp. 3484
-
-
Tsang, R.1
Dickson J.K., Jr.2
Pak, H.3
Walton, R.4
Fraser Reid, B.5
-
65
-
-
0342931107
-
-
The stereochemistry of this material was unequivocally established through desilylation and acetonide formation from the intermediate diol
-
The stereochemistry of this material was unequivocally established through desilylation and acetonide formation from the intermediate diol.
-
-
-
-
66
-
-
0017402439
-
-
Isolation: Kupchan, S. M.; LaVoie, E. J.; Branfman, A. R.; Fei, B. Y.; Bright, W. M.; Bryan, R. F. J. Am. Chem. Soc. 1977, 99, 3199.
-
(1977)
J. Am. Chem. Soc.
, vol.99
, pp. 3199
-
-
Kupchan, S.M.1
LaVoie, E.J.2
Branfman, A.R.3
Fei, B.Y.4
Bright, W.M.5
Bryan, R.F.6
-
70
-
-
0021971670
-
-
(d) Burke, S. D.; Cobb, J. E.; Takeuchi, K. J. Org. Chem. 1985, 50, 3420;
-
(1985)
J. Org. Chem.
, vol.50
, pp. 3420
-
-
Burke, S.D.1
Cobb, J.E.2
Takeuchi, K.3
-
72
-
-
0025728047
-
-
(f) Smith, A. B., III; Fukui, M.; Vaccaro, H. A.; Empfield, J. R. J. Am. Chem. Soc. 1991, 113, 2071;
-
(1991)
J. Am. Chem. Soc.
, vol.113
, pp. 2071
-
-
Smith A.B. III1
Fukui, M.2
Vaccaro, H.A.3
Empfield, J.R.4
-
74
-
-
0025907617
-
-
(h) Smith, A. B., III; Rivero, R. A.; Hale, K. J.; Vaccaro, H. A. J. Am. Chem. Soc. 1991, 113, 2092;
-
(1991)
J. Am. Chem. Soc.
, vol.113
, pp. 2092
-
-
Smith A.B. III1
Rivero, R.A.2
Hale, K.J.3
Vaccaro, H.A.4
-
75
-
-
0343366415
-
-
(i) Martin, S. F.; Dappen, M. S.; Dupre, B.; Murphy, C. J. J. Org. Chem. 1987, 52, 3706;
-
(1987)
J. Org. Chem.
, vol.52
, pp. 3706
-
-
Martin, S.F.1
Dappen, M.S.2
Dupre, B.3
Murphy, C.J.4
-
76
-
-
0024584553
-
-
(j) Martin, S. F.; Dappen, M. S.; Dupre, B.; Murphy, C. J.; Colapret, J. A. J. Org. Chem. 1989, 54, 2209;
-
(1989)
J. Org. Chem.
, vol.54
, pp. 2209
-
-
Martin, S.F.1
Dappen, M.S.2
Dupre, B.3
Murphy, C.J.4
Colapret, J.A.5
-
77
-
-
0025364718
-
-
(k) Trost, B. M.; Edstrom, E. D. Angew. Chem., Int. Ed. Engl. 1990, 29, 520;
-
(1990)
Angew. Chem., Int. Ed. Engl.
, vol.29
, pp. 520
-
-
Trost, B.M.1
Edstrom, E.D.2
-
79
-
-
0026683923
-
-
(m) Linderman, R. J.; Viviani, F. G.; Kwochka, W. R. Tetrahedron Lett. 1992, 33, 3571;
-
(1992)
Tetrahedron Lett.
, vol.33
, pp. 3571
-
-
Linderman, R.J.1
Viviani, F.G.2
Kwochka, W.R.3
-
81
-
-
0343365667
-
-
Obtained by allylation of butyrolactone (LDA, THF, -78°C, 98%) followed by ozonolysis (97%)
-
Obtained by allylation of butyrolactone (LDA, THF, -78°C, 98%) followed by ozonolysis (97%).
-
-
-
-
82
-
-
0343801362
-
-
note
-
The alkylation step (cf. 80 → 81) resulted in cyclopropane formation when an expressed ester was present (selective reaction of the ester enolate). Also, an expressed ketone on the spiropyran unit was not tolerated during this reaction, requiring reduction of 78 to 79. Fortunately, no protection of 79 was necessary. Details will be presented in a separate paper.
-
-
-
-
83
-
-
0343801361
-
-
From the acetylene and BuLi in THF at -78°C
-
From the acetylene and BuLi in THF at -78°C.
-
-
-
-
84
-
-
0343365665
-
-
Prepared from commercial 2-methyl-l,3-propanediol: (i) TBS-Cl, DMF, imidazole, 57% (chrom., mono-TBS ether formation); (ii) PCC, 66%; (iii) Corey-Fuchs reaction (63%)
-
Prepared from commercial 2-methyl-l,3-propanediol: (i) TBS-Cl, DMF, imidazole, 57% (chrom., mono-TBS ether formation); (ii) PCC, 66%; (iii) Corey-Fuchs reaction (63%).
-
-
-
-
85
-
-
2542433188
-
-
Carlsen, P. H. J.; Katsuki, T.; Martin, V. S.; Sharpless, K. B. J. Org. Chem. 1981, 46, 3936.
-
(1981)
J. Org. Chem.
, vol.46
, pp. 3936
-
-
Carlsen, P.H.J.1
Katsuki, T.2
Martin, V.S.3
Sharpless, K.B.4
-
86
-
-
0343801360
-
-
note
-
2CO. MCPBA was purified as detailed below and NBS was recrystallized from water. All other reagents and solvents were used as received.
-
-
-
-
87
-
-
0343365662
-
-
note
-
2 and any insoluble matter was filtered off. Concentration afforded pure, dry MCPBA.
-
-
-
|