Hetero Diels–Alder reaction of olefin with o-quinone methides generated using (±)-binolphosphoric acid for the stereoselective synthesis of 2,4-diarylbenzopyrans: application to the formal synthesis of myristinin B/C
作者:Santosh J. Gharpure、A. M. Sathiyanarayanan、Prasanna K. Vuram
DOI:10.1039/c3ra43526a
日期:——
Hetero Diels–Alderreaction of olefin with o-quinone methides (o-QMs) generated using (±)-binolphosphoric acid was developed for the stereoselective synthesis of 2,4-diarylbenzopyrans. The method thus developed was utilized in the formalsynthesis of myristinin B/C.
Organophotoredox-catalyzed oxidative generation of o-quinone methides (o-QMs) for inverse-electron-demand [4+2] cycloadditionreactions has been developed. One-electron oxidation of 2-(sulfanylmethyl)phenols by thioxanthylium photoredox catalyst generated o-QMs, which reacted with various styrenes to produce chromanes with high regioselectivity. This reaction offers a valuable approach for in situ