Rhodium‐Catalyzed Intramolecular [5+2] Cycloaddition of Inverted 3‐Acyloxy‐1,4‐enyne and Alkyne: Experimental and Theoretical Studies
作者:Xiaoxun Li、Wangze Song、Xiaona Ke、Xiufang Xu、Peng Liu、K. N. Houk、Xian‐liang Zhao、Weiping Tang
DOI:10.1002/chem.201601195
日期:2016.5.17
By switching the position of the alkene and alkyne, a new type of 3‐acyloxy‐1,4‐enyne (ACE) five‐carbon building block was developed for Rh‐catalyzed intramolecular [5+2] cycloaddition. An electron‐withdrawing acyl group on the alkyne termini of the ACE was essential for a regioselective 1,2‐acyloxy migration. This new method provided bicyclic [5.3.0]decatrienes that are different from previous methods
通过切换烯烃和炔烃的位置,开发了一种新型的3酰氧基-1,4-炔烃(ACE)五碳结构单元,用于Rh催化的分子内[5 + 2]环加成反应。ACE炔烃末端的吸电子酰基对于区域选择性的1,2-酰氧基迁移至关重要。由于烯烃和酰氧基的位置,该新方法提供了与先前方法不同的双环[5.3.0]十碳杂环丁烯。对于这种新的[5 + 2]环加成反应,多种机理途径成为可能,并且已通过计算研究对其进行了研究。