Asymmetric syntheses of L-homocysteine 1 and L-homocystine 2 are described.
Alkylation of the carbanion derived from Schollkopf reagent 3 and ensuing
hydrolyses gave S-triphenylmethyl-L-homocysteine 6, Removal of the tripheny
lmethyl group gave L-homocysteine 1 and subsequent oxidation provided L-hom
ocystine 2. (C) 1999 Elsevier Science Ltd. All rights reserved.