The First Total Synthesis of (−)-Benzomalvin A via Intramolecular Aza-Wittig Reactions

Abstract The first total synthesis of (−)-benzomalvin A 1, which possesses quinazolin-4(3H)-one moiety and 1,4-benzodiazepin-5-one moiety, was described. Both of 6- and 7-membered ring skeletons were efficiently constructed by intramolecular aza-Wittig reactions as the key reactions.