Catalytic Radical–Polar Crossover Reactions of Allylic Alcohols
作者:Eric E. Touney、Nicholas J. Foy、Sergey V. Pronin
DOI:10.1021/jacs.8b12075
日期:2018.12.12
Radical-polarcrossover hydrofunctionalizations of tertiary allylic alcohols are described. Depending on the structure of the catalyst, corresponding epoxides or semipinacol rearrangement products are selectively obtained in good yields. Experimental evidence points to the participation of alkylcobalt complexes as electrophilic intermediates.
The synthesis of 2,5,5-trimethylcycloheptanone from 3-carene was described. It was demonstrated that hydrogenolysis of cis-caran-trans-4-ol on nickel-and copper-containing catalysts occurred with cleavage of the internal C1–C6 bond of the cyclopropane ring and predomonant (up to 95%) formation of 2,5,5-trimethylcycloheptanone.