An iodosylbenzene - iron tetraarylporphyrin catalyst system decarboxylated α-aryl carboxylic acids and α,α,α-trisubstituted aceticacids efficiently to give the corresponding alcohol and carbonyl derivatives.
A facile synthesis of N′-(p-toluenesulfonyl)-N-alkyl- and N,N-dialkylcyanoformamidines and 1,3-dialkyl-2-(p-toluenesulfonyl)guanidines
作者:Keun Chan Oh、Hyunil Lee、Kyongtae Kim
DOI:10.1016/s0040-4039(00)61246-7
日期:1992.8
lfonylimino)-5H-1,2,3-dithiazole (2) with primary and secondary amines in CH2Cl2 at room temperature gave N′-(p-toluenesulfonyl)-N-alkyl-and N,N-dialkylcyanoformamidines (3) (53–79% yields), respectively. Refluxing of 3 with secondary amines in CH2Cl2 gave 1,3-dialkyl-2-(p-toluenesulfonyl)guanidines (7) (40–99% yields), some of which (7a, 7c) were also directly obtained from the reactions of 2 with