Dual Ligand-Enabled Nondirected C−H Olefination of Arenes
作者:Hao Chen、Philipp Wedi、Tim Meyer、Ghazal Tavakoli、Manuel van Gemmeren
DOI:10.1002/anie.201712235
日期:2018.2.23
The application of the Pd‐catalyzed oxidative C−H olefination of arenes, also known as the Fujiwara–Moritani reaction, has traditionally been limited by the requirement for directing groups on the substrate or the need to use the arene in large excess, typically as a (co)solvent. Herein the development of a catalytic system is described that, through the combined action of two complementary ligands
Synthesis of Bidentate Nitrogen Ligands by Rh-Catalyzed C–H Annulation and Their Application to Pd-Catalyzed Aerobic C–H Alkenylation
作者:Hyun Tae Kim、Eunsu Kang、Minkyu Kim、Jung Min Joo
DOI:10.1021/acs.orglett.1c01040
日期:2021.5.7
A new class of bidentate ligands was prepared by a modular approach involving Rh-catalyzedC–H annulation reactions. The resulting conformationally constrained ligands enabled the Pd-catalyzed C–H alkenylation at electron-rich and sterically less hindered positions of electron-rich arenes while promoting the facile oxidation of Pd(0) intermediates by oxygen. This newly introduced ligand class is complementary
The C−Holefination of substituted anisole derivatives as limiting reagents has been realized by a Pd/S, O-ligand catalyst providing the olefinated products in good yields and site selectivities. The reaction proceeds under mild conditions with a broad range of substituted aryl ethers bearing both electron-donating and electron-withdrawing substituents.
THIENOPYRIMIDINE DERIVATIVES, A PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM
申请人:LES LABORATOIRES SERVIER
公开号:US20150175623A1
公开(公告)日:2015-06-25
Compounds of formula (I):
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
12
, X, A and n are as defined in the description.
Medicinal products containing the same which are useful in treating pathologies involving a deficit in apoptosis, such as cancer, auto-immune diseases, and diseases of the immune system.