-
15
-
-
3242866355
-
-
For reviews of diastereoselective Wittig type reactions, see:
-
For reviews of diastereoselective Wittig type reactions, see: Rein T., Reiser O. Acta Chem. Scandinavica. 50:1996;369-379.
-
(1996)
Acta Chem. Scandinavica
, vol.50
, pp. 369-379
-
-
Rein, T.1
Reiser, O.2
-
21
-
-
37049075888
-
-
Vadecard J., Plaquevent J.-C., Duhamel L., Duhamel P. J. Chem. Soc., Chem. Commun. 1993;116-117.
-
(1993)
J. Chem. Soc., Chem. Commun.
, pp. 116-117
-
-
Vadecard, J.1
Plaquevent, J.-C.2
Duhamel, L.3
Duhamel, P.4
-
22
-
-
0030444308
-
-
Amadji M., Vadecard J., Plaquevent M., Duhamel L., Duhamel P. J. Am. Chem. Soc. 118:1996;12483-12484.
-
(1996)
J. Am. Chem. Soc.
, vol.118
, pp. 12483-12484
-
-
Amadji, M.1
Vadecard, J.2
Plaquevent, M.3
Duhamel, L.4
Duhamel, P.5
-
27
-
-
0037033228
-
-
Sano S., Yokoyama K., Teranishi R., Shiro M., Nagao Y. Tetrahedron Lett. 43:2002;281-284.
-
(2002)
Tetrahedron Lett.
, vol.43
, pp. 281-284
-
-
Sano, S.1
Yokoyama, K.2
Teranishi, R.3
Shiro, M.4
Nagao, Y.5
-
29
-
-
0034677156
-
-
Nakamura S., Nakagawa R., Watanabe Y., Toru T. Angew. Chem., Int. Ed. 39:2000;353-355.
-
(2000)
Angew. Chem., Int. Ed.
, vol.39
, pp. 353-355
-
-
Nakamura, S.1
Nakagawa, R.2
Watanabe, Y.3
Toru, T.4
-
33
-
-
85030914444
-
-
note
-
2O, 1a could be lithiated on treatment with n-BuLi without addition of a chiral ligand, giving 4 in high yield but with low enantioselectivity after addition of 3a and 4-tert-butylcyclohexanone.
-
-
-
-
34
-
-
85030894219
-
-
note
-
R 16.9 [(R)], and 19.0 [(S), 99% ee] min.
-
-
-
-
35
-
-
37049083405
-
-
A good level of enantioselectivity has been reported in the reaction of non-dipole-stabilized α-seleno carbanions through a dynamic thermodynamic resolution pathway, see: Klute W., Dress R., Hoffmann R.W. J. Chem. Soc., Perkin Trans. 2. 1993;1409-1411.
-
(1993)
J. Chem. Soc., Perkin Trans. 2
, pp. 1409-1411
-
-
Klute, W.1
Dress, R.2
Hoffmann, R.W.3
-
36
-
-
37049068925
-
-
Hoffmann R.W., Klute W., Dress R.K., Wenzel A. J. Chem. Soc., Perkin Trans. 2. 1995;1721-1726.
-
(1995)
J. Chem. Soc., Perkin Trans. 2
, pp. 1721-1726
-
-
Hoffmann, R.W.1
Klute, W.2
Dress, R.K.3
Wenzel, A.4
-
38
-
-
85030906971
-
-
note
-
We have demonstrated that the enantioselective reaction of the α-thio carbanion derived from benzyl phenyl sulfide proceeds through a dynamic kinetic resolution pathway; see Ref. 10. The reaction of the α-seleno carbanion derived from benzyl phenyl selenide was confirmed to proceed through a dynamic thermodynamic resolution pathway, showing that the α-seleno carbanion is configurationally more stable than the α-thio carbanion. The results will be published in due course.
-
-
-
-
39
-
-
85030912598
-
-
note
-
The reaction of 1b taking a longer time for lithiation resulted in lower yield of the product.
-
-
-
-
40
-
-
85030914001
-
-
note
-
We also examined the enantioselective reaction of 2-pyridyl selenide with 4-substituted cyclohexanone, but the obtained diastereomeric mixture could not be separated by column chromatography.
-
-
-
-
41
-
-
0004541564
-
-
Toru T., Hayakawa T., Nishi T., Watanabe Y., Ueno Y. Phosphorus Sulphur Silicon. 1998;653-658.
-
(1998)
Phosphorus Sulphur Silicon
, pp. 653-658
-
-
Toru, T.1
Hayakawa, T.2
Nishi, T.3
Watanabe, Y.4
Ueno, Y.5
-
42
-
-
0035974335
-
-
Nakamura S., Hayakawa T., Nishi T., Watanabe Y., Toru T. Tetrahedron. 57:2001;6703-6711.
-
(2001)
Tetrahedron
, vol.57
, pp. 6703-6711
-
-
Nakamura, S.1
Hayakawa, T.2
Nishi, T.3
Watanabe, Y.4
Toru, T.5
-
43
-
-
37049134143
-
-
For conversion of β-selenoalcohols to alkenes, see:
-
For conversion of β-selenoalcohols to alkenes, see: Reich H.J., Chow F. J. Chem. Soc., Chem. Commun. 1975;790-791.
-
(1975)
J. Chem. Soc., Chem. Commun.
, pp. 790-791
-
-
Reich, H.J.1
Chow, F.2
-
48
-
-
49349139760
-
-
For reviews, see:
-
For reviews, see: Clive D.L.J. Tetrahedron. 34:1978;1049-1132.
-
(1978)
Tetrahedron
, vol.34
, pp. 1049-1132
-
-
Clive, D.L.J.1
-
49
-
-
33745507572
-
-
Krief A. Tetrahedron. 36:1980;2531-2640.
-
(1980)
Tetrahedron
, vol.36
, pp. 2531-2640
-
-
Krief, A.1
-
50
-
-
85030903207
-
-
note
-
R 28.7 [ (M)-9 , 99% ee], and 33.4 [ (P) -9 ] min.
-
-
-
|