Highly Chemoselective Acylation of Substituted Aminophenols with 3-(Trimethylacetyl)-1,3-thiazolidine-2-thione
作者:Wei-Min Dai、Yuk King Cheung、Kit Wan Tang、Pui Yiu Choi、Suet Lam Chung
DOI:10.1016/0040-4020(95)00783-5
日期:1995.11
A general procedure for chemoselective acylation of substituted aminophenols has been developed. The N-acylated products 7 and 10a-h were prepared by treating the aminophenols with 3 (trimethylacetyl)-1,3-thiazolidine-2-thione (1) in refluxing THF in 70–100% yield. The esters 8 and 13d,b,j of 3- and 4-amino phenols could be obtained in 70–94% yield by treating with NaH and 1.
Remote amide-directed palladium-catalyzed benzylic C–H amination with N-fluorobenzenesulfonimide
作者:Tao Xiong、Yan Li、Yunhe Lv、Qian Zhang
DOI:10.1039/c0cc02175j
日期:——
An unprecedented remote amide-directed palladium-catalyzedintermolecularhighly selective benzylic C-H amination with N-fluorobenzenesulfonimide is developed, which represents the first direct benzylic C-H amination with a non-nitrene nitrogen source. This methodology provides a novel approach to circumvent the common ortho aromatic C-H selectivity in directed palladium catalyzed C-H functionalization