Manipulation of Water for Diversified Functionalization of Tetrahydro-β-carbolines (THβCs) with Indoles
作者:Dekang Xu、Fu Ye、Jinxiang Ye、Yu Gao、Haijun Chen
DOI:10.1021/acs.orglett.9b02413
日期:2019.8.2
temperature that exhibit a broad functional-group tolerance. More water leads to monoarylation, while less water leads to diarylation. Further one-step transformation afforded oxidized bis(indolyl)methanes, eudistomin U, and the related derivatives in satisfactory yields.
Organocatalytic Enantioselective Cross-Dehydrogenative Coupling of <i>N</i>-Carbamoyl Cyclic Amines with Aldehydes
作者:Zhiyu Xie、Xin Zan、Shutao Sun、Xinhui Pan、Lei Liu
DOI:10.1021/acs.orglett.6b01625
日期:2016.8.19
existing catalytic enantioselective cross-dehydrogenativecoupling of cyclic amines predominantly focused on reactive N-aryl tetrahydroisoquinolines, which typically suffered from limited substrate generality and synthetic utility, and required the use of metal catalyst. Herein, a metal-free catalytic enantioselective cross-dehydrogenativecoupling of N-carbamoyl cyclic amines and aldehydes has been reported
A novel synthetic route was developed for the construction of a chiral cis-hexahydro-γ-carboline derivative through Ir/ZhaoPhos-catalyzed asymmetrichydrogenation of corresponding tetrahydro-γ-carboline with high yields (up to 99% yield), excellent diastereoselectivities (up to >99 : 1 dr) and enantioselectivities (up to 99% ee), and high substrate-to-catalyst ratios (up to 5000).
Herein, we report a biomimeticoxidativecoupling cyclization strategy for the highly efficient functionalization of tetrahydrocarbolines (THCs). This process enables rapid access to complex isochromanoindolenine scaffolds in moderate to excellent yields. The reaction proceeds smoothly and rapidly (complete within minutes) in an open flask. This operationally simple protocol is scalable and compatible
We describe iron‐catalyzed oxidativecouplingcyclization of tetrahydrocarbazoles or THβCs or THγCs to form benzofuroindolenines as fused polycyclic indoles. This mild, efficient and simple approach afforded a library of more than 52 complex compounds across a range of substrate classes with good to excellent yields.