<i>Para</i>-Selective C–H Borylation of Common Arene Building Blocks Enabled by Ion-Pairing with a Bulky Countercation
作者:Madalina T. Mihai、Benjamin D. Williams、Robert J. Phipps
DOI:10.1021/jacs.9b07267
日期:2019.10.2
The selective functionalization of C–H bonds at the arene para position is highly challenging using transition metal catalysis. Iridium-catalyzed borylation has emerged as a leading technique for arene functionalization, but there are only a handful of strategies for para-selective borylation, which operate on specific substrate classes and use bespoke ligands or catalysts. We describe a remarkably
[EN] SOLUBLE GUANYLATE CYCLASE ACTIVATORS<br/>[FR] ACTIVATEURS DE GUANYLATE CYCLASE SOLUBLE
申请人:MERCK SHARP & DOHME
公开号:WO2011149921A1
公开(公告)日:2011-12-01
A compound of Formula (I): or a pharmaceutically acceptable salt thereof, are capable of modulating the body's production of cyclic guanosine monophosphate ("cGMP") and are generally suitable for the therapy and prophylaxis of diseases which are associated with a disturbed cGMP balance. The invention furthermore relates to processes for preparing compounds of Formula I, or a pharmaceutically acceptable salt thereof, for their use in the therapy and prophylaxis of the abovementioned diseases and for preparing pharmaceuticals for this purpose, and to pharmaceutical preparations which comprise compounds of Formula (I) or a pharmaceutically acceptable salt thereof.
Para-Selective, Iridium-Catalyzed C–H Borylations of Sulfated Phenols, Benzyl Alcohols, and Anilines Directed by Ion-Pair Electrostatic Interactions
作者:Jose R. Montero Bastidas、Thomas J. Oleskey、Susanne L. Miller、Milton R. Smith、Robert E. Maleczka
DOI:10.1021/jacs.9b08464
日期:2019.10.2
Para C-H borylation (CHB) of tetraalkylammonium sulfates and sulfamates have been achieved using bipyridne-ligated Ir boryl catalysts. Selectivities can be modulated both by the length of the alkyl groups in the tetraalkylammonium cations and the substituents on the bipyridine ligands. Ion-pairing, where the alkyl groups of the cation shield the meta C-H bonds in the conteranions, is proposed to account
四烷基硫酸铵和氨基磺酸盐的对位 CH 硼化 (CHB) 已使用联吡啶连接的 Ir boryl 催化剂实现。选择性可以通过四烷基铵阳离子中烷基的长度和联吡啶配体上的取代基来调节。离子对,其中阳离子的烷基屏蔽了对位离子中的间位 CH 键,被认为是对位选择性的原因。4,4'-二甲氧基-2,2'-联吡啶配体具有优异的选择性。
[EN] METHODS AND INTERMEDIATES FOR PREPARING A THERAPEUTIC COMPOUND USEFUL IN THE TREATMENT OF RETROVIRIDAE VIRAL INFECTION<br/>[FR] PROCÉDÉS ET INTERMÉDIAIRES POUR PRÉPARER UN COMPOSÉ THÉRAPEUTIQUE UTILE DANS LE TRAITEMENT D'UNE INFECTION VIRALE PAR RETROVIRIDAE
申请人:GILEAD SCIENCES INC
公开号:WO2019161280A1
公开(公告)日:2019-08-22
The present disclosure relates to methods and intermediates useful for preparing a compound of formula (I): (I) or a co-crystal, solvate, salt or combination thereof.
Self‐Assembly of an Anion‐Binding Cryptand for the Selective Encapsulation, Sequestration, and Precipitation of Phosphate from Aqueous Systems
作者:Craig R. Rice、Christopher Slater、Robert A. Faulkner、Robert L. Allan
DOI:10.1002/anie.201805633
日期:2018.10
filtration. Furthermore, the cavity can be tuned to be selective to either phosphate or sulfate anions by variation of the pH. Phosphateanions can be removed from water, even in the presence of other common anions, reducing the concentration from 1000 to <0.1 ppm and recovering approximately 99 % of the phosphateanions.