Efficient Nickel-Mediated Intramolecular Amination of Aryl Chlorides
摘要:
[GRAPHICS]The use of an in situ generated Ni(0) catalyst associated with 2,2'-bipyridine or N,N'-bis(2,6-diisopropylphenyl)dihydroimidazol-2-ylidene (SIPr) as a ligand and NaO-t-Bu as the base for the intramolecular coupling of aryl chlorides with amines is described. The procedure has been applied to the formation of five-, six-, and seven-membered rings.
Indolo[2,1‐a]isoquinoline alkaloids and related compounds have been known to have interesting biological activities, such as antileukemic and antitumor activities. We found that 1‐(3,4‐dimethoxyphenethyl)indole gave 2,3‐dimethoxyindolo[2,1‐a]isoquinoline and 1‐(3,4‐dimethoxyphenylacetyl)indole gave 2,3‐dimethoxy‐6‐oxoindolo[2,1‐a]isoquinoline, respectively, by an intramolecular cyclization carried
TMEDA‐Catalyzed Regioselective Decarboalkoxy C−N Bond Formation: A Unified Direct Access to Indolo[2,1‐
<i>a</i>
]isoquinoline and Dibenzopyrrocoline Alkaloids
作者:Lalit Yadav、Bharti Rajesh Kumar Shyamlal、Mohit K. Tiwari、Abdul Rahaman T. A、Janmejaya Sen、Sandeep Chaudhary
DOI:10.1002/asia.202200398
日期:2022.8.15
An unprecedented TMEDA-catalyzed, regioselective, decarboethoxy directC−N coupling protocol towards the synthesis of dibenzopyrrocolines 17 a–i and 5,6-dihydroindolo[2,1-a]isoquinoline 15 a–f/18 a–c alkaloids via the identification of N, N, N′, N′-tetramethylethylenediamine (TMEDA) as a homogeneous catalyst is reported.
一种前所未有的TMEDA催化、区域选择性、脱乙氧基直接C - N偶联方案,通过报道了 N, N, N', N'-四甲基乙二胺 ( TMEDA ) 作为均相催化剂的鉴定。