Parallel Syntheses of Eight-Membered Ring Sultams via Two Cascade Reactions in Water
作者:Tao Ji、Yanjie Wang、Min Wang、Ben Niu、Ping Xie、Charles U. Pittman、Aihua Zhou
DOI:10.1021/co400116p
日期:2013.12.9
cascade reaction protocols were developed to synthesize eight-memberedring sultams in water. These protocols employ intermolecular Michael addition by NaOH or NaHS in water, followed by rapid proton transfer and intramolecular 8-endo-tet epoxide ring-opening to give medium-size sultams selectively in one-pot. Novel core structures and high synthetic efficiency make these cascade reactions highly suitable