Divergent Synthesis of (Benzo[b][1,4]diazepin‐2‐yl)phosphonates and (Quinoxalin‐2‐yl)methylphosphonates from Phosphoryl‐Substituted Conjugated Ynones

Abstract

AbstractIt is shown that the reaction of conjugated ynones containing a phosphoryl group with o‐phenylenediamines can, depending on the conditions, lead to the selective formation of phosphorylated 1,5‐benzodiazepines and quinoxalines. Phosphorylated quinoxalines can be used for synthesis of substituted vinyl quinoxalines.