Dithioallyl cation (3 + 2) cycloadditions under aprotic reaction conditions: rapid access to spiro-fused cyclopentane scaffolds
作者:Frederick Degroote、Bram Denoo、Bram Ryckaert、Brenda Callebaut、Kristof Van Hecke、Jan Hullaert、Johan M. Winne
DOI:10.1039/d3ob01273e
日期:——
We report a general method to effect all-carbon (3 + 2) cycloadditions that can elaborate cyclopentenes from a range of olefins. The required dithioallyl cation reagents can be generated in a newly developed mild protocol starting from 2-allyloxypyridine precursors, thus avoiding the use of strong Brønsted acids. The novelmethod significantly expands the substrate scope, which now also includes acid-sensitive