1,4-Conjugate addition/esterification of <i>ortho</i>-quinone methides in a multicomponent reaction
作者:Renjie Chen、Yu Liu、Sunliang Cui
DOI:10.1039/c8cc07328g
日期:——
A novel 1,4-conjugate addition/esterification of ortho-quinone methides in a multicomponent reaction has been developed. In this protocol, numerous carboxylic acids, ynamides and in situ generated ortho-quinone methides could assemble rapidly to constitute this process for the synthesis of functionalized 3,3-diarylpropanamides with sufficient structural diversity. Furthermore, the products could be
Palladium-Catalyzed Enantioselective Addition of Chiral Metal Enolates to In Situ Generated <i>ortho</i>
-Quinone Methides
作者:Fabian Göricke、Christoph Schneider
DOI:10.1002/anie.201809692
日期:2018.11.5
describe herein a conceptually novel, cooperative Brønsted acid/base catalyzed process for the conjugate addition of cyclic β‐keto esters to ortho‐quinone methides both generated in situ. Upon hemiacetalization, densely functionalizedchiral chromans with two adjacent quaternary and additionally a tertiary stereogenic center were obtained with very good diastereoselectivity (up to >95:5 d.r.) and typically