Improved Synthesis of 1-Chloro-6-methoxy-isoquinolin-3-ol and Its Derivatives
作者:Zhizhen Barbara Zheng、Alan Xiangdong Wang、Paul Scola、Stanley D'Andrea
DOI:10.1080/00397910802517889
日期:2009.3.10
Abstract A convenient and efficient synthetic route to 1-chloro-6-methoxy-isoquinolin-3-ol and itsderivatives is reported. This newmethod involves carboxylation of 4-methoxy-2-methylbenzonitrile, subsequent conversion of the resulting 2-cyano-5-methoxy-phenylacetic acid to its acid chloride, and acid-promoted cyclization of the 2-cyano-5-methoxy-phenyl-acetyl chloride. This procedure offers a better