A series of 3-(arylalkyl)-2,4,5-trioxoimidazolidine-1-acids (1) was prepared and tested for aldose reductase (AR) and aldehyde reductase (ALR) inhibitory activities. These compounds showed strong inhibitory activity against AR without significant inhibitory activity for ALR. The ratio of IC50(ALR)/IC50(AR) was > 1000 in some compouds. On the basis of pharmacological tests such as the recovery of reduced motor nerve conduction velocity and toxicological profile, 3-(3-nitrobenzyl)-2,4,5-trioxoimidazolidine-1-acid (NZ-314) was selected as the candidate for clinical development.
Cyclic (Alkyl)(amino)carbene Ligand-Promoted Nitro Deoxygenative Hydroboration with Chromium Catalysis: Scope, Mechanism, and Applications
作者:Lixing Zhao、Chenyang Hu、Xuefeng Cong、Gongda Deng、Liu Leo Liu、Meiming Luo、Xiaoming Zeng
DOI:10.1021/jacs.0c12318
日期:2021.1.27
Transition metal catalysis that utilizes N-heterocycliccarbenes as noninnocent ligands in promoting transformations has not been well studied. We report here a cyclic (alkyl)(amino)carbene (CAAC) ligand-promoted nitro deoxygenative hydroboration with cost-effective chromium catalysis. Using 1 mol % of CAAC-Cr precatalyst, the addition of HBpin to nitro scaffolds leads to deoxygenation, allowing for
[EN] DIHYDROQUINOLIZINONES AS ANTIVIRALS<br/>[FR] DIHYDROQUINOLIZINONES À UTILISER EN TANT QU'ANTIVIRAUX
申请人:GLAXOSMITHKLINE IP DEV LTD
公开号:WO2018154466A1
公开(公告)日:2018-08-30
Compounds, specifically hepatitis B virus and/or hepatitis D virus inhibitors, more specifically compounds that inhibit HBe antigen and HBs antigen in a subject, for the treatment of viral infections, and methods of preparing and using such compounds. Formula (I):
Various cobalt pincer type complexes 1–6 were applied for the catalytic hydrogenation of nitriles to amines. Among these, catalyst 4 is the most efficient, allowing the reduction of aromatic as well as aliphaticnitriles in moderate to excellent yields.
Cobalt-Catalyzed and Lewis Acid-Assisted Nitrile Hydrogenation to Primary Amines: A Combined Effort
作者:Kenan Tokmic、Bailey J. Jackson、Andrea Salazar、Toby J. Woods、Alison R. Fout
DOI:10.1021/jacs.7b07368
日期:2017.9.27
The selective hydrogenation of nitriles to primary amines using a bench-stable cobalt precatalyst under 4 atm of H2 is reported herein. The catalyst precursor was reduced in situ using NaHBEt3, and the resulting Lewis acid formed, BEt3, was found to be integral to the observed catalysis. Mechanistic insights gleaned from para-hydrogen induced polarization (PHIP) transfer NMR studies revealed that the
本文报道了在 4 个大气压的 H 2 下使用实验室稳定的钴预催化剂将腈选择性氢化成伯胺。使用 NaHBEt 3 原位还原催化剂前体,并且发现所形成的路易斯酸 BEt 3 是观察到的催化作用的组成部分。从对氢诱导极化 (PHIP) 转移 NMR 研究中收集到的机理见解表明,腈的成对氢化是通过 Co(I/III) 氧化还原过程进行的。
Direct Preparation of Amides from Amine Hydrochloride Salts and Orthoesters: A Synthetic and Mechanistic Perspective
作者:Martin J. Di Grandi、Caitlin Bennett、Kristen Cagino、Arnold Muccini、Corey Suraci、Shahrokh Saba
DOI:10.1080/00397911.2015.1096943
日期:2015.11.17
Abstract The conversion of a wide range of primary and secondary aliphatic and a few arylamine hydrochloridesalts to their corresponding acetamides with trimethyl orthoacetate is described. Mechanistic studies using NMR and gas chromatography–mass spectrometry techniques indicate these reactions proceed via an O-methylimidate intermediate that undergoes in situ demethylation by chloride, affording