Palladium-Catalyzed Annulation of Aryl Heterocycles with Strained Alkenes
摘要:
An annulation reaction proceeding by the intermolecular addition of an arylpalladium(II) halide across a strained alkene, followed by an intramolecular C-H functionalization of a pendant heterocycle is described. A variety of polycyclic heterocycles have been prepared from readily accessible haloaryl heterocycles by annulation with a range of strained alkene partners.
reaction for N-substituted pyrrole synthesis using 2,5-dimethoxytetrahydrofuran with variously substituted aromatic amines has been developed (up to 89% yield). This interesting neat strategy is free from additives including co-catalysts, ligands, and acids. Relatively low cost, environmentally benign, and handy Mn(NO3)2·4H2O is employed as the catalyst undermicrowave conditions with a very short reaction
Palladium-Catalyzed Formal [4 + 1] Annulation via Metal Carbene Migratory Insertion and C(sp<sup>2</sup>)–H Bond Functionalization
作者:Shuai Xu、Ri Chen、Zihao Fu、Qi Zhou、Yan Zhang、Jianbo Wang
DOI:10.1021/acscatal.6b03562
日期:2017.3.3
A highly efficient and operationally simple palladium-catalyzed formal [4 + 1] annulationreaction has been developed. The reaction is featured by the formation of two different C–C bonds on a carbenic center. It represents a concise method for the synthesis of a wide range of polycyclic aromatic hydrocarbons (PAHs) and 1H-indenes with easily available (trimethylsilyl)diazomethane as the carbene source
One-Pot Synthesis of Pyrrolo[1,2-<i>a</i>]quinoxaline Derivatives via a Copper-Catalyzed Aerobic Oxidative Domino Reaction
作者:Huanhuan Liu、Tiantian Duan、Zeyuan Zhang、Caixia Xie、Chen Ma
DOI:10.1021/acs.orglett.5b01167
日期:2015.6.19
A copper-catalyzed process for the synthesis of pyrrolo[1,2-a]quinoxalines from readily available α-amino acids and 1-(2-halophenyl)-1H-pyrroles is described. Different functional groups were well tolerated to give the corresponding products.
描述了一种铜催化的方法,该方法由容易获得的α-氨基酸和1-(2-卤代苯基)-1 H-吡咯合成吡咯并[1,2- a ]喹喔啉。不同的官能团具有良好的耐受性,可提供相应的产品。
Angiotenin II antagonizing heterocyclic derivatives
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US05215994A1
公开(公告)日:1993-06-01
The invention relates to compounds of the formula ##STR1## wherein ##STR2## represents a condensed or uncondensed imidazolyl ring and the rest of the variables are as defined in the specification. They are angiotensin II antagonists useful for treating hypertension, etc..
Angiotensin II antagonizing heterocyclic derivatives
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US05210092A1
公开(公告)日:1993-05-11
The invention concerns compounds of the formula ##STR1## represents a condensed or uncondensed imidazolyl ring and the rest of the variables are defined in the specification. They are angiotensin II antagonists useful for treating hypertension, etc.