作者:P. Mayer、P. Brunel、T. Imbert
DOI:10.1016/s0960-894x(99)00531-4
日期:1999.10
The key step of the synthesis of efaroxan was the dihydrobenzofuran ring formation involving an intramolecular cyclization of the tertiary alcohol intermediate with the fluoroaromatic moiety in basic medium. This carbinol was prepared according to two routes, either from reaction of a benzyl Grignard reagent with an alpha-ketoester, or from a Darzens condensation.
合成依法氧烷的关键步骤是二氢苯并呋喃环的形成,该过程涉及在碱性介质中叔醇中间体与氟代芳烃部分的分子内环化。该甲醇是根据两种途径制备的,即从苄基格氏试剂与α-酮酸酯的反应或从Darzens缩合反应制备。