Enantioselective synthesis of 2-methyl indolines by palladium catalysed asymmetric C(sp3)–H activation/cyclisation
作者:Saithalavi Anas、Alex Cordi、Henri B. Kagan
DOI:10.1039/c1cc14292e
日期:——
activation by an intramolecular ArPdX species and subsequent cyclisation was developed. Palladium catalysts using commercially available chiral diphosphines yield good ee's (up to 93% ee) in the synthesis of 2-methyl indolines from 2-halo N-isopropyl anilides. This approach was also employed for the synthesis of enantioenriched cyclohexyl fused indolines with moderate enantioselectivities.
开发了分子内ArPdX物种对映选择性甲基CH活化和随后环化的第一个例子。使用可商购的手性二膦的钯催化剂在由2-卤代N-异丙基苯胺合成2-甲基二氢吲哚中产生良好的ee(高达93%ee)。该方法也用于合成具有中等对映选择性的富含对映体的环己基稠合的二氢吲哚。