SYNTHESIS OF N-ALKYL-N-{[(TRIPHENYLPHOSPHORANYLID ENE)-AMINO]SULFONYL}THIOUREAS FROM ETHYL N-ALKYL-N'-{[(TRIPHENYL-PHOSPHORANYLIDENE)AMINO] SULFONYL)CARBAMIMIDOTHIOATES
摘要:
N-(Triphenylphosphoranylidene)sulfamoyl chloride was reacted with the ethyl ester monohydrobromide of a series of N-alkylcarbamimidothioic acids (alkylpseudothiuronium salts) to give ethyl N-alkyl-N'-{[(triphenylphosphoranylidene)amino]sulfonyl}carbamimidothioates which: were converted to the corresponding N-alkyl-N'-{[(triphenylphosphoranylide)amino]sulfonyl}thioureas by S-dealkylation with NaHS/H2S in DMF.