Divergent total synthesis of penaresidin B and its straight side chain analogue

Abstract The divergent synthesis of penaresidin B and its straight side chain analogue was accomplished by constructing an azetidine ring via S N 2 type cyclization of protected 2,3- syn -3,4- syn -4-amino-1,3-dihydroxyhept-6-en-2-yl mesylate and late-stage introduction of an alkyl side chain via olefin cross-metathesis of 4-allylazetidine with readily available terminal alkenes. This synthetic route would be useful to synthesize penaresidin side chain analogues.