Stereoselective Traceless Borylation-Allenation of Propargylic Epoxides: Dual Role of the Copper Catalyst
作者:Carlos Jarava-Barrera、Alejandro Parra、Laura Amenós、Ana Arroyo、Mariola Tortosa
DOI:10.1002/chem.201705019
日期:2017.12.11
Dual player: In this report, chiral α-allenols are prepared with high diastereocontrol through an unprecedented and spontaneous β-oxygen elimination of an α-epoxy vinyl boronate. Stoichiometric experiments and DFT calculations support a dual role of the copper catalyst, which orchestrates the hydroboration and the syn-elimination step.
双重作用:在此报告中,通过空前和自发地消除α-环氧乙烯基硼酸酯的β-氧,可以高度非对映控制地制备手性α-烯醇。计量实验和理论计算支持铜催化剂,其编排硼氢化和双重作用SYN在剔除一步。