The Reaction of N-Isocyaniminotriphenylphosphorane with 2-Oxopropylbenzoate (or 4-Bromobenzoate) and a Primary Amine in the Presence of (E)-Cinnamic Acid Derivatives: A One-Pot Efficient Four-Component Reaction for the Synthesis of 2-(Arylamino)-2-(5-aryl
Reactions of N‐isocyaniminotriphenylphosphorane with 2‐oxopropylbenzoate (or 2‐oxopropyl 4‐bromobenzoate) in the presence of (E)‐cinnamic acids and primary amines proceed smoothly at room temperature and in neutral conditions to afford sterically congested 1,3,4‐oxadiazole derivatives in high yields. The reaction proceeds smoothly and cleanly under mild conditions and no side reactions were observed