Direct Access to Monoprotected Homoallylic 1,2-Diols via Dual Chromium/Photoredox Catalysis
作者:Felix Schäfers、Linda Quach、J. Luca Schwarz、Mar Saladrigas、Constantin G. Daniliuc、Frank Glorius
DOI:10.1021/acscatal.0c03697
日期:2020.10.16
Herein, we present a dual catalytic strategy to efficiently obtain monoprotected homoallylic 1,2-diols by coupling abundant aldehydes with simple (silyl) enol ethers, thus providing direct access to this important motif without the (super) stoichiometric use of prefunctionalized metal-allyl species. The modularity of our approach is shown by the introduction of several silyl- and alkyl-based protecting
Amination of Carbenium Ions Generated by Directed Protonolysis of Cyclopropane
作者:Marija Skvorcova、Lukass T. Lukasevics、Aigars Jirgensons
DOI:10.1021/acs.joc.8b02576
日期:2019.4.5
Directed intramolecular protonolyis of the cyclopropane C–C bond is demonstrated as a strategy to generate carbenium ions. This intermediate can be subjected to amination with nitriles under Ritter reaction conditions. Directing groups such as carbamate, carboxamide, urea, ester, and ketone were found to be efficient for regioselective anti-Markovnikov cleavage of cyclopropane. Depending on the directing
Radical-Cation Vinylcyclopropane Rearrangements by TiO<sub>2</sub> Photocatalysis
作者:Naoya Maeta、Hidehiro Kamiya、Yohei Okada
DOI:10.1021/acs.joc.0c00544
日期:2020.5.15
Radicalcation vinylcyclopropane rearrangements by TiO2 photocatalysis in lithium perchlorate/nitromethane solution are described. The reactions are triggered by oxidative single electron transfer, which is followed by immediate ring-opening of the cyclopropanes to generate distonic radicalcations as unique reactive intermediates. This approach can also be applied to vinylcyclobutane, leading to the
[EN] PYRIDINE-1-OXIDE DERIVATIVES AND THEIR USE AS FACTOR XIA INHIBITORS<br/>[FR] DÉRIVÉS DE PYRIDINE-1-OXYDE ET LEUR UTILISATION EN TANT QU'INHIBITEURS DU FACTEUR XIA
申请人:MERCK SHARP & DOHME
公开号:WO2018039094A1
公开(公告)日:2018-03-01
The present invention provides a compound of Formula (I) and pharmaceutical compositions comprising one or more said compounds, and methods for using said compounds for treating or preventing thromboses, embolisms, hypercoagulability or fibrotic changes. The compounds are selective Factor XIa inhibitors or dual inhibitors of Factor XIa and plasma kallikrein.
Alkyl substituted aminal derivatives of HCV NS5A inhibitor MK-8742
作者:Wensheng Yu、Craig A. Coburn、Anilkumar G. Nair、Michael Wong、Ling Tong、Michael P. Dwyer、Bin Hu、Bin Zhong、Jinglai Hao、De-Yi Yang、Oleg Selyutin、Yueheng Jiang、Stuart B. Rosenblum、Seong Heon Kim、Brian J. Lavey、Guowei Zhou、Razia Rizvi、Bandarpalle B. Shankar、Qingbei Zeng、Lei Chen、Sony Agrawal、Donna Carr、Laura Rokosz、Rong Liu、Stephanie Curry、Patricia McMonagle、Paul Ingravallo、Fred Lahser、Ernest Asante-Appiah、Amin Nomeir、Joseph A. Kozlowski
DOI:10.1016/j.bmcl.2016.05.041
日期:2016.8
HCVNS5Ainhibitors have demonstrated impressive in vitro potency profiles in HCV replicon assays and robust HCV RNA titer reduction in the clinic making them attractive components for inclusion in an all oral fixed dose combination regimen for the treatment of HCV infection. Herein we describe our continued research efforts around the alkyl “Z group” modification of the tetracyclic indole-based NS5A