Intramolecular Direct Dehydrohalide Coupling Promoted by KO<sup><i>t</i></sup>Bu: Total Synthesis of <i>Amaryllidaceae</i> Alkaloids Anhydrolycorinone and Oxoassoanine
作者:Subhadip De、Santanu Ghosh、Subhajit Bhunia、Javeed Ahmad Sheikh、Alakesh Bisai
DOI:10.1021/ol3019677
日期:2012.9.7
substitution (HAS) with aryl radicals has been developed in the presence of potassium tert-butoxide and an organic molecule as the catalyst. The methodology has been applied to a concisesynthesis of Amaryllidaceae alkaloids viz. oxoassoanine (1b), anhydrolycorinone (1d), and other related structures. Interestingly, the method also works only in the presence of potassium tert-butoxide.
A tandem Heck–aza-Michael addition protocol for the one-pot synthesis of isoindolines from unprotected amines
作者:Ke Chen、Sumod A. Pullarkat
DOI:10.1039/c2ob25854d
日期:——
A palladacycle-catalyzed tandem Heck-intramolecular aza-Michael reaction protocol has been developed for the one-pot synthesis of 1-substituted isoindolines from N-unprotected 2-bromobenzylamines and acrylates with high yields.