New diastereoselective method for constructing a carbon chain by conversion of N,N′-dialkyl-N,N′-diacylhydrazines to threo-1,2-dicarboxylic acid derivatives
作者:Igor V. Magedov、Yuri I. Smushkevich
DOI:10.1039/c39900001686
日期:——
A diastereoselectivemethod is described for constructing a carbonchain by conversion of N,N′-dialkyl-N,N′-diacylhydrazines (1a–f) to dialkyldiamides of threo-1,2-dicarboxylicacids (3a–f).
A New General Synthesis of Bistetrafluoroborates of 2,3,4,5-Tetrasubstituted 1,3,4-Thiadiazoliums
作者:Nicolai M. Przheval'skii、Igor V. Magedov、Victor N. Drozd
DOI:10.1055/s-1993-25880
日期:——
A new preparative method for the synthesis of bistetrafluoroborates of 2,3,4,5-tetrasubstituted 1,3,4-thiadiazoliums 5a-e from N, N-dialkyl-N,N-dithioacylhydrazines 1a-e is reported. This reaction is extended to the synthesis of bistetrafluoroborate of 3,5-bis(N,N-dimethyliminium)-1,2,4-trithiolane (7) starting from tetramethyl-thiuram disulfide (6). The mechanism of the reaction is discussed.