19879-94-8Relevant academic research and scientific papers
Nucleophilic Substitutions and Eliminations of Amino Functions via Pyrimidinium Salts
Spitzner, Roland,Lesinski, Markus,Richter, Monika,Schroth, Werner
, p. 485 - 502 (2007/10/02)
Reaction of 2,4-diphenyl-1,3-thiazine-6-thione (1) with primary amines leads under ring transformation to 1-organyl-pyrimidine-6-thiones 3, which are alkylated to 1-organyl-6-methylthiopyrimidinium salts 5.The latter allow a transfer of the 1-organyl group to nucleophilic agents by departure of 2,4-diphenyl-6-methylthio-pyrimidine (8).In special cases an elimination reaction is successful.Preparative advantages and limitations are demonstrated and discussed. - Keywords: 1,3-Thiazine-6-thione; Pyrimidine-6-thiones; Pyrimidinium salts; Nucleophilic substitution; Elimination reaction
An Improved Electrochemical Preparation of Alkoxytriphenylphosphonium Salts
Ohmori, Hidenobu,Nakai, Shiro,Miyasaka, Hitoshi,Masui, Masaichiro
, p. 4192 - 4194 (2007/10/02)
Constant current electrolysis of triphenylphosphine in acetonitrile containing an alcohol and benzoic or succinic acid in a one-compartment cell gave better yields of the title compounds than the previously reported controlled potential electrolysis in a divided cell.Constant voltage electrolysis was also found to be effective.The phosphonium salts reacted with carboxylic acids to form esters in high yields.Keywords - alkoxytriphenylphosphonium perchlorates; triphenylphosphine; anodic oxidation; constant current electrolysis; constant voltage electrolysis; ester formation
