Demonstrated herein is the construction of trifluoromethylated quaternarycarboncenters by an asymmetric radical transformation. Enantioenriched trifluoromethylated oxindoles were accessed using a hypervalent iodine‐based trifluoromethyl transfer reagent in combination with a magnesium Lewis acid catalyst and PyBOX‐type ligands to achieve up to 99 % ee and excellent chemical yields. Mechanistic studies
本文展示了通过不对称自由基转化的三氟甲基化季碳中心的构造。使用高价碘基三氟甲基转移试剂,结合路易斯酸镁催化剂和PyBOX型配体,可得到富含对映体的三氟甲基化吲哚,可实现高达99%的ee和优异的化学收率。通过实验和计算方法进行了机理研究,并提出了单电子转移诱导的S N 2型机理。因此,本例是有关使用高价碘基试剂通过这样的反应途径构建富含对映体的三氟甲基化碳中心的第一个报告。
Transition metal-free functionalization of 2-oxindoles <i>via</i> sequential aldol and reductive aldol reactions using rongalite as a C1 reagent
A sequential one-pot classical aldol, transition-metal and hydride-free reductive aldol reaction is reported here for C(sp3)- H functionalization of 2-oxindoles using the multifaceted reagent rongalite. Here, rongalite functions as a hydride-free reducing agent and double C1 unit donor. This protocol enables the synthesis of a wide range of 3-methylindoline-2-ones and 3-(hydroxymethyl)-3-methylindolin-2-ones
[EN] INHIBITORS OF CYSTEINE PROTEASES AND METHODS OF USE THEREOF<br/>[FR] INHIBITEURS DE CYSTÉINE PROTÉASES ET LEURS PROCÉDÉS D'UTILISATION
申请人:PARDES BIOSCIENCES INC
公开号:WO2021252644A1
公开(公告)日:2021-12-16
The disclosure provides compounds of formula II with warheads and their use in treating medical diseases or disorders, such as viral infections. Pharmaceutical compositions and methods of making various compounds with warheads are provided. The compounds are contemplated to inhibit proteases, such as the 3C, CL- or 3CL-like protease. Formula II