Application of Organolithium and Related Reagents in Synthesis, Part 24. Synthetic Strategies Based on Aromatic Metallation. A Concise Regiospecific Conversion of Benzoic Acids into 2-(1-Aryl-2-methoxycarbonylethyl)benzoic Acids
作者:Jan Epsztajn、Adam Bieniek、Justyna A. Kowalska、Krystyna K. Kulikiewicz
DOI:10.1055/s-2000-7610
日期:——
The synthesis of the 3-arylphthalides 3 via metallation (BuLi) of the benzanilides 1 and subsequent reaction of the generated bis-lithiated anilides 2 with aromatic aldehydes is described. Conversion of 3 into the corresponding 2-(1-aryl-2-methoxycarbonylethyl)benzoic acids 4 by treatment with 1-methoxy-1-trimethylosiloxyethene in the presence of titanium tetrachloride, as a way of regiospecific transformation
描述了通过苯甲酰苯胺 1 的金属化 (BuLi) 合成 3-芳基苯酞 3 以及随后生成的双锂化苯胺 2 与芳香醛的反应。还描述了通过在四氯化钛存在下用 1-甲氧基-1-三甲基硅氧烷乙烯处理将 3 转化为相应的 2-(1-芳基-2-甲氧基羰基乙基)苯甲酸 4,作为苯甲酸的区域特异性转化的一种方式.