Catalytic Asymmetric and Divergent Synthesis of Tricyclic and Tetracyclic Spirooxindoles: Controllable Site-Selective Electrophilic Halocyclization of 1,6-Enynes
作者:Taochun Zha、Xinyu Tong、Yuhua Deng、Fangzhi Peng、Zhihui Shao
DOI:10.1021/acs.orglett.9b02202
日期:2019.8.2
Catalytic asymmetric and divergent assembly of tricyclic and tetracyclic 3,3′-pyrrolidonyl spirooxindoles was developed, involving a one-pot chiral Brønsted base catalyzed asymmetric propargylation for the synthesis of oxindole 1,6-enynes and a subsequent switchable site-selective and highly diastereoselective electrophilic iodocyclization of 1,6-enynes. In addition, antitumor properties of the newly
研发了三环和四环的3,3'-吡咯烷酮螺环辛多酯的催化不对称和发散组装体,该反应涉及一锅手性Brønsted碱催化的不对称炔丙基化反应,用于合成羟吲哚1,6-炔烃,随后可进行位点选择性和高度非对映选择性1,6-烯炔的亲电碘环化。另外,评估了新合成的化合物的抗肿瘤性质。