Superacidic Activation of 1- and 3-Isoquinolinols and Their Electrophilic Reactions<sup>1</sup>
作者:Konstantin Yu. Koltunov、G. K. Surya Prakash、Golam Rasul、George A. Olah
DOI:10.1021/jo0204855
日期:2002.12.1
Prolonged reaction time or catalysis under strongly acidic HBr-AlBr(3) provides an alternative reaction pathway to yield 5,6-dihydro-6,8-diphenyl-1(2H)- and 5,6,7,8-tetrahydro-6,8-diphenyl-3(2H)-isoquinolinones (25 and 30), respectively. Products 24 and 29 were also found to revert back to 11 and 12 in the presence of aluminum halides in o-dichlorobenzene. The mechanism of these intriguing reactions, which
当在CF(3)SO(3)H-SbF(5)酸体系中活化时,异美1和3异喹啉醇(11和12)经历与环己烷的选择性离子氢化反应,得到5,6,7,8-tetrahydro-1 (2H)-和5,6,7,8-四氢-3(2H)-异喹啉酮(22和27)。在氯化铝的影响下,还分别获得了3,4-二氢-1(2H)-和1,4-二氢-3(2H)-异喹啉酮(23和28)类似的产物。在温和的条件下,化合物11和12在卤化铝存在下也与苯缩合,得到3,4-二氢-3-苯基-1(2H)-和1,4-二氢-1-苯基-3(2H) )-异喹啉酮(分别为24和29)。在强酸性HBr-AlBr(3)下延长反应时间或催化提供了另一种反应途径,可产生5,6-dihydro-6,8-diphenyl-1(2H)-和5,6,7,8-tetrahydro-6 ,8-二苯基-3(2H)-异喹啉酮(25和30),分别。还发现在邻二氯苯中存在卤化铝的情况