Heat Versus Basic Conditions: Intramolecular Dehydro-Diels–Alder Reaction of 1-Indolyl-1,6-heptadiynes for the Selective Synthesis of Substituted Carbazoles
作者:Akira Sakakura、Takayuki Kudoh、Syo Fujisawa、Megumi Kitamura
DOI:10.1055/s-0036-1588461
日期:2017.10
The intramolecular dehydro-Diels–Alder reaction of 1-indolyl-1,6-heptadiynes proceeds smoothly under rather mild heating conditions to give substituted carbazoles in moderate to good yields. The reaction of 7-aryl-1-indolyl-1,6-heptadiynes under heating gives the corresponding carbazoles chemoselectively in high yields, whereas the reaction under basic conditions gives naphthalenes as major products
1-吲哚基-1,6-庚二炔的分子内脱氢-狄尔斯-阿尔德反应在相当温和的加热条件下顺利进行,以中等至良好的产率得到取代咔唑。7-芳基-1-吲哚基-1,6-庚二炔在加热下的反应化学选择性地以高产率得到相应的咔唑,而在碱性条件下的反应得到萘作为主要产物。