Ligand-enabled Ir-catalyzed intermolecular diastereoselective and enantioselective allylic alkylation of 3-substituted indoles
作者:Xiao Zhang、Wen-Bo Liu、Hang-Fei Tu、Shu-Li You
DOI:10.1039/c5sc01772f
日期:——
An Ir-catalyzed asymmetric allylic alkylation of 3-substituted indoles is reported. The reaction provides indoline products containing multiple contiguousstereocenters with high site-, regio-, diastereo- and enantioselectivities in onestep from a wide range of readily available starting materials. The key to this method is the high level of diastereocontrol enabled by an iridium catalyst derived
报道了 Ir 催化的 3-取代吲哚的不对称烯丙基烷基化。该反应从多种容易获得的起始原料中一步获得含有多个连续立体中心的二氢吲哚产物,具有高位点选择性、区域选择性、非对映选择性和对映选择性。该方法的关键是由源自N-芳基亚磷酰胺配体 (Me-THQphos, 1c ) 的铱催化剂实现的高水平非对映控制。
Synthesis of naked amino-pyrroloindoline via direct aminocyclization of tryptamine
unprotected amino-pyrroloindoline via aminocyclization of tryptamine and tryptophan has been described. A variety of structurally diverse amino-pyrroloindolines are furnished by the use of O-(2,4-dinitrophenyl)hydroxylamine (DPH) as the nitrogen source in the presence of catalytic Rh2(esp)2.