2-Phenyl-3-aminopropionitrile über mannichbasen—IV
作者:H. Möhrle、S. Dörnbrack
DOI:10.1016/s0040-4020(01)93559-8
日期:1972.1
The α-morpholinomethyl-α-toluonitrile described by Zief and Mason as the product of the reaction of morpholinomethanol with benzylcyanide, is a mixture with dimorpholinomethane as main constituent together with benzyl-cyanide and morpholine. The compound with the expected structure was synthesized unequivocally. An analytical comparison showed that the Mannich reaction gives no aminonitrile.
Benzylcyanide and 4-nitrobenzylcyanide condensed with triethyl orthoformate and piperidine or morpholine to yield 2-aryl-2-piperidinyl or 2-morpholinylacrylonitriles. These coupled with aromatic diazonium salts to yield the 2-arylhydrazno-2-arylethane nitriles in good yields. The latter were converted into 4-aminopyrazoles in good yields using the Thorpe-Ziegler cyclization.