Reactions of α-substituted glycine derivatives with stannanes
作者:Christopher J. Easton、Steven C. Peters
DOI:10.1016/s0040-4039(00)61151-6
日期:1992.9
α-Benzoyloxy- and α-methoxy-substituted glycine derivatives are more stable than the corresponding bromides, yet they undergo analogous reactions with stannanes. Their reactions with mixtures of hexabutylditin and dialkyl disulphides give α-alkylthio-substituted glycine derivatives, a procedure that is applicable to the synthesis of cross-linked amino acid derivatives.
The reactions between S-nitrosothiols and phosphite esters, including P(OPh)3, P(OBn)3, and P(OEt)3, were studied. Two different conjugated adducts, thiophosphoramidates and phosphorothioates, were formed, depending on the structures of the S-nitrosothiol substrate (e.g., primary vs tertiary). These reactions proceeded under mild conditions, and the reaction mechanisms were studied using experiments