A palladium-catalyzed asymmetric annulative allylicalkylation reaction of 2-[(1H-indol-2-yl)methyl]malonates with (E)-but-2-ene-1,4-diyl dicarbonates is described, leading to the regio- and enantioselective synthesis of dihydropyrido[1,2-a]indoles with a chiral cyclic allyl stereocenter adjacent to the ring-junction nitrogen atom in moderate to good yields. The salient features of this protocol include
描述了 2-[(1 H -indol-2-yl)methyl] 丙二酸酯与 ( E )-but-2-ene-1,4-diyl dicarbonates的钯催化不对称环烯丙基烷基化反应,导致区域- 和对映选择性合成二氢吡啶并 [1,2- a ] 吲哚,其具有与环连接氮原子相邻的手性环状烯丙基立体中心,收率中等至良好。该协议的显着特点包括温和的条件、广泛的底物范围、与取代基的良好相容性以及高区域选择性和立体选择性,为制造手性吡啶并吲哚支架提供催化不对称入口。
VICE, S. F.;COPELAND, C. R.;FORSEY, S. P.;DMITRIENKO, G. I., TETRAHEDRON LETT., 1985, 26, N 43, 5253-5256
作者:VICE, S. F.、COPELAND, C. R.、FORSEY, S. P.、DMITRIENKO, G. I.