Application of Organolithium Compounds in Organic Synthesis. XIX. Synthetic Strategies Based on Aromatic Metallation. A Concise Regiospecific Synthesis of 3-Halogenated Picolinic and Isonicotinic Acids
作者:J. Epsztajn、M. W. Płtka、A. Grabowska
DOI:10.1080/00397919708003053
日期:1997.3
synthesis of the halogenated picolin- and isonicotinanilides (3) and (4) via metallation (n-BuLi) of the anilides (1) and (2) and then the reaction of the generated bis-lithiated anilides with halogenating agents (CCI3-CCI3, CH2Br-CH2Br, I2) followed by subsequent acidic hydrolysis of (3) and (4), as a way of regiospecific transformation of picoline and isonicotine acids into their C3-halogenated derivatives
摘要 通过苯胺 (1) 和 (2) 的金属化 (n-BuLi),然后生成的双锂化苯胺与卤化剂 (CCl3描述了-CCl3、CH2Br-CH2Br、I2),随后对(3) 和(4) 进行酸性水解,作为将甲基吡啶和异烟碱酸区域特异性转化为其C3 卤代衍生物的一种方式。