2-Nitrophenyl Isocyanide as a Versatile Convertible Isocyanide: Rapid Access to a Fused γ-Lactam β-Lactone Bicycle
作者:Cynthia B. Gilley、Yoshihisa Kobayashi
DOI:10.1021/jo800486k
日期:2008.6.1
2-Nitrophenyl isocyanide is introduced as a convertible isocyanide with demonstration of its feasibility and applicability in an efficient synthesis of the fused γ-lactam β-lactone bicycle of proteasome inhibitor omuralide. Starting from a linear keto acid precursor, the fused γ-lactam β-lactone bicycle was prepared in four steps by a sequential biscyclization strategy; a stereocontrolled Ugi reaction