First Total Synthesis of Martinellic Acid, a Naturally Occurring Bradykinin Receptor Antagonist MaDawei XiaChengfeng JiangJiqing ZhangJianhua 2001 The first total synthesis of martinellic acid, a naturally occurring bradykinin receptor antagonist, via a CuI-catalyzed coupling reaction of β-amino ester <b>6</b> with 1,4-diiodobenzene and a guanylation reaction of secondary amine <b>3</b> under mild conditions as key steps, is described.