Stereocontrolled synthesis of R or S E or Z unsaturated α—amino acids by enantio- and diastereoselective epoxidation of δ-hydroxy allylic phosphine oxides
作者:Jonathan Clayden、Eric W. Collington、Stuart Warren
DOI:10.1016/s0040-4039(00)91787-8
日期:1993.2
Epoxidation of δ-hydroxy allylic phosphine oxides 5 with m-CPBA can be syn selective. All stereoisomers of epoxy alcohols 6 are available when this method is used in tandem with an anti selective Sharpless kinetic resolution. The stereoisomers of epoxy alcohols 6 can be transformed stereospecifically into single isomers of unsaturated α—aminoacids 7. A mechanistic explanation for the stereoselectivity
Clayden, Jonathan; Warren, Stuart, Journal of the Chemical Society. Perkin transactions I, 1993, # 23, p. 2913 - 2924
作者:Clayden, Jonathan、Warren, Stuart
DOI:——
日期:——
Clayden, Jonathan; Collington, Eric W.; Egert, Ernst, Journal of the Chemical Society. Perkin transactions I, 1994, # 19, p. 2801 - 2810
作者:Clayden, Jonathan、Collington, Eric W.、Egert, Ernst、McElroy, Andrew B.、Warren, Stuart
DOI:——
日期:——
Clayden Jonathan, Collington Eric W., Egert Ernst, McElroy Andrew B., War+, J. Chem. Soc. Perkin Trans. 1, (1994) N 19, S 2801- 2810
作者:Clayden Jonathan, Collington Eric W., Egert Ernst, McElroy Andrew B., War+
DOI:——
日期:——
Asymmetric epoxidations and kinetic resolutions of δ-hydroxy allylic phosphine oxides
作者:Jonathan Clayden、Eric W. Collington、Stuart Warren
DOI:10.1016/s0040-4039(00)60928-0
日期:1992.11
Delta-Hydroxy allylic phosphine oxides 5 undergo asymmetric epoxidation to yield epoxy alcohols 6 with high enantio- and diastereoselectivity. Kinetic resolutions are also successful, even with a chiral centre remote from the allylic hydroxyl, if that chiral centre bears a diphenylphosphinoyl group. The diphenylphosphinoyl group then exerts a novel anti-directing effect on the epoxidation.