Novel synthesis of pyrrolidinones by cobalt carbonyl catalyzed carbonylation of azetidines. A new ring-expansion-carbonylation reaction of 2-vinylazetidines to tetrahydroazepinones
作者:Dominique Roberto、Howard Alper
DOI:10.1021/ja00201a040
日期:1989.9
Pyrrolidinones can be synthesized in high yields and regioselectivity by the cobalt carbonyl catalyzed carbonylation of azetidines. For 2-substituted azetidines (alkyl, aryl, CH 2 OH, CH 2 OR, CH 2 OCOR, and COOR), carbonyl insertion occurs in the more or less substituted ring carbon-nitrogen bond depending on the kind of substituent group and on the reaction temperature. In the case of 2-vinylazetidines
吡咯烷酮可以通过羰基钴催化的氮杂环丁烷羰基化以高产率和区域选择性合成。对于 2-取代的氮杂环丁烷(烷基、芳基、CH 2 OH、CH 2 OR、CH 2 OCOR 和 COOR),羰基插入发生在或多或少取代的环碳 - 氮键中,这取决于取代基的种类和反应温度。在 2-乙烯基氮杂环丁烷的情况下,扩环和羰基化得到七元环四氢氮杂环酮。在这些反应中观察到良好的官能团耐受性