A Facile Reduction Procedure for N,N′‐bis[5‐Substituted Salicylidene]‐m/p‐phenylenediamines with Sodium Borohydride–Silica Gel System

Abstract An easy approach involving sodium borohydride/silica gel system offers a fast method of reduction for N,N′‐bis[5‐substituted salicylidene] m/p‐phenylenediamines to the corresponding amines with excellent yield. The observed formation of boron chelates in the borohydride reduction of some related Schiff bases has been avoided in this method.