1-三甲苯基异戊烯(1),1-三甲苯基-3-甲基丙二烯(2)和1-三甲苯基-3,3-二甲基丙二烯(3)在癸烷中通过[1.5 s ]σ-H-在150-190°下热重排移位得到邻喹啉甲烷4,其环化生成1,2-二氢萘5和6和/或经历[1,7 a ]σH移位得到1-甲磺酰基-(Z)-buta-1, 3-二烯(Z)-7和(Z)-8(方案1,3,4和5)的数量几乎是定量的。这些异构化的活化参数在表1中给出。1-Mesityl-1-甲基丙二烯(9)在190°下异构化,以4,50 %的收率得到4,5,7-三甲基-1,2-二氢萘(17)。方案6)。
Photoinduced Palladium-Catalyzed Carbofunctionalization of Conjugated Dienes Proceeding via Radical-Polar Crossover Scenario: 1,2-Aminoalkylation and Beyond
作者:Kelvin Pak Shing Cheung、Daria Kurandina、Tetsuji Yata、Vladimir Gevorgyan
DOI:10.1021/jacs.0c03993
日期:2020.6.3
A photoinduced palladium-catalyzed 1,2-carbofunctionalization of conjugateddienes has been developed. This mild modular approach, which does not require employment of exogeneous photosensitizers and external oxidants, allows for efficient and highly regio- and ste-reoselective synthesis of a broad range of allylic amines from readily available 1,3-dienes, alkyl iodides, and amines. Employment of O-