A new process for the regiocontrolled synthesis of substituted catechols and other 1,2-dioxygenated aromatics: conjugate addition of vinyl-, aryl-, and heteroarylcopper reagents to cyclobutenediones followed by thermal rearrangement
作者:Angela Gurski、Lanny S. Liebskind
DOI:10.1021/ja00067a027
日期:1993.7
A general method for the synthesis of substituted catechol derivatives has been developed utilizing the 1,4-addition of vinyl-, aryl-, and heteroarylcuprates to cyclobutendiones followed by thermal rearrangement. In situ protection with (methoxyethoxy)methyl chloride of the enolate derived from addition of the cuprate yields 2-alkoxy-4-R unsat'd -2-cyclobutenones, which rearrange thermally to substituted