Selective Synthesis of Seven- and Eight-Membered Ring Sultams via Two Tandem Reaction Protocols from One Starting Material
作者:Min Wang、Yanjie Wang、Xueyong Qi、Guohua Xia、Kun Tong、Jinchang Tu、Charles U. Pittman、Aihua Zhou
DOI:10.1021/ol301535j
日期:2012.7.20
From one starting material, two tandem reaction protocols to synthesize seven- and eight-memberedring sultams were developed. One protocol employs intermolecular epoxide ring-opening by NaN3, followed by an intramolecular 7-endo-trig oxa-Michael addition reaction. The second protocol applies to intermolecular aza-Michael addition of a primary amine, followed by 8-endo-tet intramolecular epoxide ring-opening