(E)-3-ethylidene-4-vinylpyrrolidin-2-ones in a regioselective and stereoselective manner. The preliminary asymmetric studies were also performed, which indicated a potential for enantioselective annulation of vinyl enolate intermediates with transition-metal−π-allyl species.
开发了N-杂环卡宾有机催化和过渡
金属催化在3-取代的丁-2-烯酸酯和1-
甲苯磺酰基-2-
乙烯基氮丙啶之间正式[3 + 2]环合的协同组合。该合作策略以区域选择性和立体选择性的方式提供了对各种功能化的(E)-3-亚乙基-4-
乙烯基吡咯烷酮-2-酮的便捷有效访问。还进行了初步的不对称研究,表明具有过渡
金属-π-烯丙基物种的烯醇
乙烯基中间体的对映选择性环化的潜力。