From a Remarkable Manifestation of Polar Effects in a Radical Fragmentation to the Convergent Synthesis of Highly Functionalized Ketones
作者:Laurent Debien、Samir Z. Zard
DOI:10.1021/ja400831w
日期:2013.3.13
A new radical addition/C-C bond fragmentation process is reported. Vinyl carbinols derived from 2-methyl-2-phenylpropanal react with radicals generated from xanthates to give the corresponding ketones. The radical cleavage reaction proceeds under mild conditions, in good to high yield, and in the presence of the unprotected carbinol. Highly functionalized 1,5-diketones and pyridines are readily available
报道了一种新的自由基加成/CC 键断裂过程。衍生自 2-甲基-2-苯基丙醛的乙烯基甲醇与由黄原酸酯产生的自由基反应生成相应的酮。自由基裂解反应在温和的条件下进行,收率良好至高,并且存在未保护的甲醇。使用这种方法可以很容易地获得高度官能化的 1,5-二酮和吡啶。