The reactions of N-trimethylsilyl substituted ethers of α- and β-amino acids with sulfur tetrafluoride and morpholinosulfur trifluoride

Abstract

ABSTRACT The reactions of N-trimethylsilyl derivatives of α- and β-amino acid esters with sulfur tetrafluoride lead to the formation of the corresponding difluorides of imidosulfurous acids F2S=N-X (X = α or β-amino acid residue). The reaction products of difluorides with N-trimethylsilylmorpholine are ketimines or aldimines of new types, containing an imine fragment =N-S-NR2 at the α- or β-carbon atom of the amino acid. The reactions of difluorides F2S=N-X with N-trimethylsilyl esters of α- and β-amino acids lead to the formation previously unknown derivatives of sulfur diimides with amino acid residues at the nitrogen atoms of the group -N=S=N-.