The Preparation and Coupling Reactions of 2-Bromo-1,4-benzodioxin. A Simple Synthesis of 2-(1-Alkenyl)-, 2-Alkyl-and 2-Aryl-1,4-benzodioxins
作者:Thomas V. Lee、Alistair J. Leigh、Christopher B. Chapleo
DOI:10.1055/s-1989-27201
日期:——
2-Bromo-1,4-benzodioxin is prepared by dehydrobromination of 2,3-dibromo-2,3-dihydro-1,4-benzodioxin with base. It is converted into 2-alkyl-, 2-(1-alkenyl)-, and 2-aryl-1,4-benzodioxins by reaction with the respective Grignard reagents or by conversion into 2-(bromomagnesio)-1,4-benzodioxin and reaction of this Grignard reagent with alkyl, 1-alkenyl, or aryl halides.
2-溴-1,4-苯并二恶烷是由 2,3-二溴-2,3-二氢-1,4-苯并二恶烷与碱进行脱氢溴化反应制备而成。它可通过与相应的格氏试剂反应转化为 2-烷基、2-(1-烯基)和 2-芳基-1,4-苯并二恶烷,或通过转化为 2-(溴镁基)-1,4-苯并二恶烷并使这种格氏试剂与烷基、1-烯基或芳基卤化物反应转化为 2-溴-1,4-苯并二恶烷。