On the mechanism of conversion of 4-carboxy-3,4-dihydro-3-phenyl-1(2H)-isoquinolones to indeno[1,2-c]isoquinolines by thionyl chloride
作者:Xiangshu Xiao、Andrew Morrell、Phillip E. Fanwick、Mark Cushman
DOI:10.1016/j.tet.2006.07.072
日期:2006.10
It has been known for a long time that thionyl chloride can effectively mediate the transformation of 4-carboxy-3,4-dihydro-3-phenyl-1(2H)-isoquinolones to indeno[1,2-c]isoquinolines. The mechanism of this unique transformation, however, remains to be established. Evidence is presented to demonstrate that (1) the two-electron dehydrogenation precedes Friedel–Crafts cyclization and (2) the two-electron
长期以来,人们已经知道亚硫酰氯可以有效地介导4-羧基-3,4-二氢-3-苯基-1(2 H)-异喹诺酮向茚并[1,2- c ]异喹啉的转化。但是,这种独特转变的机制仍有待建立。证据表明,(1)二电子脱氢先于Friedel-Crafts环化,(2)二电子脱氢通过H-4脱质子化,然后内酰胺部分进行O-亚磺酰化,而不是C-亚磺酰化。碳α到羧基。