A catalytic enantioselective reaction using a C2-symmetric disulfonamide as a chiral ligand: Alkylation of aldehydes catalyzed by disulfonamide-Ti(O-i-Pr)4-Dialkyl zinc system
Use of Group 4 Bis(sulfonamido) Complexes in the Intramolecular Hydroamination of Alkynes and Allenes
作者:Lutz Ackermann、Robert G. Bergman、Rebecca N. Loy
DOI:10.1021/ja0361547
日期:2003.10.1
the intramolecularhydroamination of alkynes and allenes more efficiently than Cp-based species. We report here that electron-withdrawing and sterically demanding bis(sulfonamido) ligands lead to enhanced catalytic activity. Zirconium analogues have also been prepared, and the tosyl-substituted complex 20 has been structurally characterized. As in the titanium series, bis(sulfonamido) zirconium catalysts
COMPOUNDS AND SYNTHETIC METHODS FOR THE PREPARATION OF RETINOID X RECEPTOR-SPECIFIC RETINOIDS
申请人:Io Therapeutics, Inc.
公开号:US20190152888A1
公开(公告)日:2019-05-23
Provided herein are compounds useful for the preparation of compounds that have retinoid-like biological activity. Also provided herein are processes for the preparation of compounds that have retinoid-like biological activity.
Disclosed herein are compounds useful for treating a viral infection, such as HCV.
本文公开了用于治疗病毒感染,如HCV的化合物。
Compounds and synthetic methods for the preparation of retinoid X receptor-specific retinoids
申请人:Io Therapeutics, Inc.
公开号:US10590059B2
公开(公告)日:2020-03-17
Provided herein are compounds useful for the preparation of compounds that have retinoid-like biological activity. Also provided herein are processes for the preparation of compounds that have retinoid-like biological activity.
Use of chiral B(III) complexes in the cycloaddition of C,N-diphenylnitrone to tert-butyl vinyl ether
作者:Pau Bayón、Pedro de March、Marta Figueredo、Josep Font、Jordi Medrano
DOI:10.1016/s0957-4166(00)00405-5
日期:2000.11
The 1,3-dipolar cycloaddition of C,N-diphenylnitrone to tert-butyl vinyl ether in the presence of several chiral B(III) complexes which incorporate different bidentate ligands has been investigated. The use of these B(III) species reverses the endo/exo diastereoselectivity in relation to the uncatalysed reaction, giving trans cycloadducts as major products. Some of the catalysts gave very fast and high yielding reactions, but the enantioselectivities were only low to moderate. (C) 2000 Elsevier Science Ltd. All rights reserved.