Dehydrogenative coupling of cyclic enones with heteroarenes has been a longstanding challenge because of the competitive ketone dehydrogenation and conjugated addition. Herein, a dehydrogenative couplingreaction of cyclic enones of different sizes with substituted thiophenes to construct β-thienyl cyclic enone compounds through palladium-catalyzed C–H functionalization under mild reaction conditions is
Methods and Compositions to Inhibit Edema Factor and Adenylyl Cyclase
申请人:Schein Catherine H.
公开号:US20090093519A1
公开(公告)日:2009-04-09
Small molecules and their derivatives are described for the treatment and/or prevention of intestinal fluid loss. Also disclosed are methods of using said molecules and their derivatives to treat and/or prevent conditions associated with increased levels of 3′,5′-adenosine monophosphate. Specific compositions of the invention are also novel.
Methods and compositions to inhibit edema factor and adenylyl cyclase
申请人:Board of Regents, The University of Texas System
公开号:US08003692B2
公开(公告)日:2011-08-23
Fluorene-based molecules and their derivatives are described in compositions for the treatment of intestinal fluid loss.
描述了基于芴的分子及其衍生物在治疗肠道液体丢失的组合物中的应用。
METHODS AND COMPOSITIONS TO INHIBIT EDEMA FACTOR AND ADENYLYL CYCLASE
申请人:Schein Catherine H.
公开号:US20120010233A1
公开(公告)日:2012-01-12
Small molecules and their derivatives are described for the treatment and/or prevention of intestinal fluid loss. Also disclosed are methods of using said molecules and their derivatives to treat and/or prevent conditions associated with increased levels of 3′,5′-adenosine monophosphate. Specific compositions of the invention are also novel.
Palladium-Catalyzed Direct C–H Alkenylation with Enol Pivalates Proceeds via Reversible C–O Oxidative Addition to Pd(0)
作者:Nahiane Pipaón Fernández、Gregory Gaube、Kyla J. Woelk、Mathias Burns、Damian P. Hruszkewycz、David C. Leitch
DOI:10.1021/acscatal.2c01305
日期:2022.6.17
We report a directtandem C–O/C–H activation approach to C–Cbond formation using palladium catalysis. This reaction combines C–O oxidative addition at enol pivalates with concerted metalation–deprotonation of functionalized heterocycles to achieve base-free directC–H alkenylation. Preliminary mechanistic studies revealed that the C–O oxidative addition to Pd(0) is reversible under these conditions