Rhodium-Catalyzed Asymmetric N−H Functionalization of Quinazolinones with Allenes and Allylic Carbonates: The First Enantioselective Formal Total Synthesis of (−)-Chaetominine
作者:Yirong Zhou、Bernhard Breit
DOI:10.1002/chem.201705059
日期:2017.12.22
An unprecedented asymmetric N−H functionalization of quinazolinones with allenes and allylic carbonates was successfully achieved by rhodium catalysis with the assistance of chiral bidentate diphosphine ligands. The high efficiency and practicality of this method was demonstrated by a low catalyst loading of 1 mol % as well as excellent chemo‐, regio‐, and enantioselectivities with broad functional
CYCLIC DERIVATIVES AS MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY
申请人:Cherney J. Robert
公开号:US20080114052A1
公开(公告)日:2008-05-15
The present application describes modulators of MCP-1 of formula (I):
or pharmaceutically acceptable salt forms thereof, useful for the prevention of rheumatoid arthritis, multiple sclerosis, atherosclerosis and asthma, processes for preparing and intermediates thereof.
The activation and utilization of challenging aliphaticalcohols like methanol and ethanol is a very appealing approach to synthesize valuable organic molecules. Utilization of methanol and ethanol as a coupling partner has emerged as a valuable alternative to synthesize industrially relevant N-heterocycles because they can be easily procured from renewable sources unlike other activated coupling partners
Synthesis of febrifuginol analogues and evaluation of their biological activities
作者:Huong Doan Thi Mai、Giang Vo Thanh、Van Hieu Tran、Van Nam Vu、Van Loi Vu、Bich Ngan Truong、Thi Dao Phi、Van Minh Chau、Van Cuong Pham
DOI:10.1016/j.tetlet.2014.11.028
日期:2014.12
A new series of febrifuginol analogues was prepared from L-glutamic acid. An antimalarial activity evaluation against chloroquine-sensitive (T96) and chloroquine-resistant (K1) Plasmodium falciparum indicated that all the tested compounds had very strong inhibitory activity. Compounds 4 and 17b' were inactive against KB, MCF7, HepG2 and LU1 cell lines even at a concentration of 100 mu M, while they exhibited significant inhibition towards P. falciparum. Comparison of the antimalarial activity and the cytotoxic properties revealed that the 2'S isomers were more active than the corresponding 2'R isomers for this series of febrifuginol analogues, indicating that the C-2' position is critical for the biological activity of this class of compounds. (C) 2014 Elsevier Ltd. All rights reserved.
SUBSTITUTED HETEROAROMATIC COMPOUNDS AND THEIR USE IN MEDICINE