The aldol-type condensation of succinic esters with aldehydes and ketones was discovered by Stobbe in 1893 and recently has been investigated in great detail by Johnson and his co- workers. 2 Although a large number of similar reactions have also been reported for succinic acid and succinic anh~ dride,~ only one report of such a condensation involving succinonitrile has been found in the literat~ re.~ The aldol-type condensations of suc-(1)(a ...
