Access to 2-(Het)aryl and 2-Styryl Benzoxazoles via Palladium-Catalyzed Aminocarbonylation of Aryl and Vinyl Bromides
作者:Karoline T. Neumann、Anders T. Lindhardt、Benny Bang-Andersen、Troels Skrydstrup
DOI:10.1021/acs.orglett.5b00642
日期:2015.5.1
procedure for the synthesis of either 2-(hetero)aryl or 2-styryl benzoxazoles is reported, starting from aryl and vinyl bromides, respectively, involving an initial aminocarbonylation with 2-aminophenols as nucleophiles followed by an acid mediated ring closure to generate the heterocycle. The methodology displays a broad substrate scope in moderate to excellent yields and can be exploited for 13C-isotope
One Pot Regioselective Synthesis of a Small Library of Dibenzo[<i>b</i>,<i>f</i>][1,4]thiazepin-11(10<i>H</i>)-ones via Smiles Rearrangement
作者:Yongmei Zhao、Qiaoling Dai、Zhi Chen、Qihui Zhang、Yongcheng Bai、Chen Ma
DOI:10.1021/co300139s
日期:2013.2.11
A facile and efficientmethod has been developed for the synthesis of a small library of dibenzo[b,f][1,4]thiazepin-11(10H)-ones via Smiles rearrangement. Compounds were obtained in excellent isolated yields (70%–92%) under metal-free conditions. More specifically, this transition metal-free process relates to an environmentally friendly, economical, and efficientmethod for preparing benzoic-fused