A Facile Reduction Procedure for<i>N</i>,<i>N</i>′‐<i>bis</i>[5‐Substituted Salicylidene]‐<i>m</i>/<i>p</i>‐phenylenediamines with Sodium Borohydride–Silica Gel System
Abstract An easy approach involving sodiumborohydride/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 borohydridereduction of some related Schiff bases has been avoided in this method.