A convenient synthesis of dibenzo[a,c]cyclooctene based on thioenol ether reduction
作者:Pierre André Lottaz、Timothy R.G. Edwards、Yves G. Mentha、Ulrich Burger
DOI:10.1016/s0040-4039(00)61640-4
日期:1993.1
9,10,11,12-Tetrahydrodibenzo[a,b]cyclooctane-9,12-diol (6) is found to be reluctant to double bond forming elimination. It gives a bridge ether (7) instead. The corresponding diketone (5) reacts with benzyl mercaptan to provide the bis-thioenol ether (8-a. The latter, upon treatment with Raney nickle, gives the desired title diene 1. An alternative approach to 1, based on repeated carbane addition
发现9,10,11,12-四氢二苯并[a,b]环辛烷-9,12-二醇(6)不愿消除双键。取而代之的是桥醚(7)。相应的二酮(5)与苄硫醇反应,生成双硫烯醇醚(8-a。后者在用阮内尼(Raney nickle)处理后,得到所需的标题二烯1.基于重复的卡宾加成反应,可制得1的另一种方法。还提供了菲。