93. Synthetic Progress toward Azadirachtins. 2. Enantio- and Diastereoselective Synthesis of the Right-Wing Fragment of 11-epi-Azadirachtin I-YANG Group

93. Synthetic Progress toward Azadirachtins. 2. Enantio- and Diastereoselective Synthesis of the Right-Wing Fragment of 11-epi-Azadirachtin I

Ceheng Tan, Wei Chen, Xinpeng Mu, Qi Chen, Jianxian Gong *, Tuoping Luo *, and Zhen Yang

Org. Lett., 2015, 17, 2338

A stereoselective three-component coupling reaction of allylzinc bromide, silyl glyoxylate, and a β-lactone has been developed. This has been successfully applied to the enantio- and diastereoselective synthesis of the fully functionalized furopyran moiety of azadirachtins.