作者:Pierre L. Beaulieu、Jean Simon Duceppe、Carolyne Johnson
DOI:10.1021/jo00013a023
日期:1991.6
(R)- or (S)-benzyl 4-formyl-2,2-dimethyl-3-oxazolidinecarboxylate (7a) and (R)- or (S)-1,1-dimethylethyl 4-formyl-2,2-dimethyl-3-oxazolidinecarboxylate (7b), readily available from serine, react with Wittig reagents to give alkenes 8. Selective deprotection followed by oxidation of the resulting unsaturated amino alcohols 9 provides vinylglycines 5 of defined configuration (> 95% ee) and double-bond geometry. D-Vinylglycines are obtained from L-serine, and conversely, D-serine gives beta,gamma-unsaturated amino acids with the L configuration. The double-bond geometry is controlled by the nature of the phosphorous ylide employed. The scope and limitations of this new methodology for the preparation of chiral vinylglycines is examined.
BEAULIEU, PIERRE L.;DUCEPPE, JEAN-SIMON;JOHNSON, CAROLYNE, J. ORG. CHEM., 56,(1991) N3, C. 4196-4204
作者:BEAULIEU, PIERRE L.、DUCEPPE, JEAN-SIMON、JOHNSON, CAROLYNE
DOI:——
日期:——
BEAULIEU, PIERRE L.;SCHILLER, PETER W., TETRAHEDRON LETT., 29,(1988) N 17, 2019-2022