Recently in our laboratory, Mannich condensations of benzetriazole and an aldehyde with various XYNH compounds have given reactive intermediate adducts. which upon nucleophilic displacement of the benzotriazole moiety by a carbanion, have resulted in versatile syntheses of N-alkylated derivatives. The method is usually convenient (one-pot). selective. and high yielding. The monoalkylation of aromatic amines, 1 “the preparation of ...