Noncovalent Immobilization of Cationic Ruthenium Complex in a Metal–Organic Framework by Ion Exchange Leading to a Heterogeneous Olefin Metathesis Catalyst for Use in Green Solvents
A simple strategy for noncovalentimmobilization of an olefin metathesiscatalyst inside a (Cr)MIL-101-SO3Na metal–organic framework (MOF) was presented. The olefin metathesis active core—an alkylidene complex bearing an ammonium-tagged NHC ligand (Apeiron’s FixCat)—was immobilized by ion exchange facilitated by the use of crown ether. The hybrid material thus obtained was shown with a number of model
The present invention covers 5-aryl-3,9-diazaspiro[5.5]undecan-2-one compounds of general formula (I) and general formula (I-a): (I) and (I-a), in which R1, R2, R3 and R4 are as defined herein, methods of preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds and the use of said compounds for manufacturing pharmaceutical compositions for the treatment and/or prophylaxis of diseases, in particular of hyperproliferative disorders, as a sole agent or in combination with other active ingredients.
Desulfonylative Electrocarboxylation with Carbon Dioxide
作者:Jun-Song Zhong、Zi-Xin Yang、Cheng-Lin Ding、Ya-Feng Huang、Yi Zhao、Hong Yan、Ke-Yin Ye
DOI:10.1021/acs.joc.1c01261
日期:2021.11.19
most investigated electrochemical approaches for converting thermodynamically inert carbon dioxide (CO2) into value-added carboxylic acids. By converting organic halides into their sulfone derivatives, we have developed a highly efficient electrochemical desulfonylative carboxylation protocol. Such a strategy takes advantage of CO2 as the abundant C1 building block for the facile preparation of multifunctionalized
有机卤化物的电羧化是将热力学惰性二氧化碳 (CO 2 ) 转化为增值羧酸的最受研究的电化学方法之一。通过将有机卤化物转化为其砜衍生物,我们开发了一种高效的电化学脱磺酰羧化方案。这种策略利用 CO 2作为丰富的 C1 结构单元,在温和的反应条件下轻松制备多功能羧酸,包括非甾体抗炎药布洛芬。
Biomimetic Desymmetrization of a Carboxylic Acid
作者:Matthew T. Knowe、Michael W. Danneman、Sarah Sun、Maren Pink、Jeffrey N. Johnston
DOI:10.1021/jacs.7b12185
日期:2018.2.14
The enantioselective desymmetrization of carboxylic acids by chiral Brønsted base catalysis is reported, leading to bridged bicyclic lactones with up to 94% ee. Crystallographic analysis of a substrate-catalyst complex suggests an origin of stereocontrol, reminiscent of functional Brønsted bases in biological settings, and enabled reaction optimization. The products contain an all-carbon quaternary
据报道,通过手性 Brønsted 碱催化对羧酸进行对映选择性去对称化,产生高达 94% ee 的桥连双环内酯。底物-催化剂复合物的晶体学分析表明立体控制的起源,让人想起生物环境中的功能性布朗斯台德碱,并实现反应优化。该产品含有全碳四元立体中心,可衍生为功能化环戊烷。