ChemInform Abstract: Addition of Diphenyldiazomethane to Unsubstituted and Chloro‐Substituted 1,4‐Benzoquinones. Effects of Chloro Substituents on the Addition Modes.

Abstract

AbstractThe reaction of the differently chloro‐substituted 1,4‐benzoquinones (I) or (VII) with diphenyldiazomethane (II) leads to two sorts of products: (III)‐(V) and (IX), (X) arise from addition of (II) to the C=C double bonds of (I) or (VII) in the first reaction step, whereas (VI) and (XI) result from addition to the C=O double bond.