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