提出了通过Rh(III)催化2-芳基吲哚与sulf基ox的级联反应,对不同取代的苯并[ a ]咔唑和吲哚并[ 2,1- a ]-异喹啉进行高度化学和区域选择性的合成。具体而言,在Rh(III)的催化下,用亚砜亚砜处理2-芳基吲哚,2-芳基吲哚-3-甲醛,2-芳基吲哚-3-腈或2-芳基-3-甲基吲哚导致选择性地形成6 -芳基/烷基苯并[一个]咔唑,5- acylbenzo [一个]咔唑,6-氨基-5- acylbenzo [一个]咔唑或12 methylindolo [2,1-一个分别是]异喹啉。从机理上讲,标题化合物的形成涉及级联过程,包括惰性C(sp 2)-H键的金属化,通过原位类胡萝卜素的形成将叶立德迁移插入碳-金属键,原金属脱金属和缩合。据我们所知,这是第一个将β-羰基sulf代亚砜用作稳定的卡宾前体和双官能C2合成子以提供苯并[ a ]咔唑和吲哚[2,1- a ]异喹啉的实例。
Methods for the synthesis of an indole in provided. Methods comprise oxidizing a N-aryl imine in the presence of a palladium-based catalyst, an oxidant, and a solvent.
提供一种合成吲哚的方法。方法包括在钯基催化剂,氧化剂和溶剂的存在下氧化N-芳基亚胺。
Palladium-Catalyzed C(sp<sup>2</sup>)–H Cyanation Using Tertiary Amine Derived Isocyanide as a Cyano Source
An unprecedented palladium-catalyzed cyanation of aromatic C-H bonds by using tertiary amine derived isocyanide as a novel cyano source was developed. Cu(TFA)(2) was used as a requisite stoichiometric oxidant. Mechanistic studies suggest that a tertiary carbon cation-based intermediate Is involved following the C-N bond breakage.
US9334275B2
申请人:——
公开号:US9334275B2
公开(公告)日:2016-05-10
PIDA-Mediated Oxidative C−C Bond Formation: Novel Synthesis of Indoles from <i>N</i>-Aryl Enamines
作者:Wenquan Yu、Yunfei Du、Kang Zhao
DOI:10.1021/ol900576a
日期:2009.6.4
A variety of functionalized indoles were synthesized from N-arylenaminesvia PIDA-mediated oxidative carbon−carbon bond formation. The features of the present reaction include facilitative preparation of substrates 2, good functional group tolerance, and mild reaction conditions without transition metals.