Hierarchically Mesoporous<i>o</i>-Hydroxyazobenzene Polymers: Synthesis and Their Applications in CO<sub>2</sub>Capture and Conversion
作者:Guipeng Ji、Zhenzhen Yang、Hongye Zhang、Yanfei Zhao、Bo Yu、Zhishuang Ma、Zhimin Liu
DOI:10.1002/anie.201602667
日期:2016.8.8
ability to complex with metal ions, such as Cu2+, Zn2+,Ni2+, achieving a metal loading up to 26.24 wt %. Moreover, the polymers complexed with Zn showed excellent performance for catalyzing the reaction of CO2 with epoxide, affording a TOF of 2570 h−1 in the presence of tetrabutyl ammonium bromide (7.2 mol %). The polymer complexed with Cu could catalyze the oxidation of alcohol with high efficiency.
具有多种功能的分级介孔聚合物的合成是具有挑战性的。在此,我们报告了在温和条件下基于重氮偶合反应在水性溶液中合成具有分级多孔结构的酚类偶氮聚合物的无模板策略。所得聚合物的表面积最大为593 m 2 g -1,中孔比率> 80%,并且具有与金属离子(例如Cu 2 +,Zn 2 +,Ni 2+)络合的良好能力,从而获得了金属负载量高达26.24 wt%。此外,与Zn络合的聚合物表现出优异的催化CO 2与环氧化物反应的性能,TOF为2570 h -1在四丁基溴化铵(7.2摩尔%)的存在下。与铜配合的聚合物可以高效地催化醇的氧化。
Glycine transporter-1 inhibitors
申请人:Hitchcock Stephen
公开号:US20080004289A1
公开(公告)日:2008-01-03
The present invention provides compounds that are glycine transporter 1 (hereinafter referred to as GlyT-1) inhibitors and are therefore useful for the treatment of diseases treatable by inhibition of GlyT1 such as cognitive disorders associated with Schizophrenia, ADHD (attention deficit hyperactivity disorder), MCI (mild cognitive impairment), and the like. Also provided are pharmaceutical compositions containing such compounds and processes for preparing such compounds.
The present invention provides compounds that are glycine transporter 1 (hereinafter referred to as GlyT-1) inhibitors and are therefore useful for the treatment of diseases treatable by inhibition of GlyT1 such as cognitive disorders associated with Schizophrenia, ADHD (attention deficit hyperactivity disorder), MCI (mild cognitive impairment), and the like. Also provided are pharmaceutical compositions containing such compounds and processes for preparing such compounds.
Organocatalytic Michael Addition of Unactivated α-Branched Nitroalkanes to Afford Optically Active Tertiary Nitrocompounds
作者:Beñat Lorea、Ane García-Urricelqui、José M. Odriozola、Jesús Razkin、Maialen Espinal-Viguri、Mikel Oiarbide、Antonia Mielgo、Jesús M. García、Claudio Palomo
DOI:10.1021/acs.orglett.3c03340
日期:2023.12.8
The direct, asymmetric conjugateaddition of unactivated α-branched nitroalkanes is developed based on the combined use of chiral amine/ureidoaminal bifunctional catalysts and a tunable acrylate template to provide tertiary nitrocompounds in 55–80% isolated yields and high enantioselectivity (e.r. up to 96:4). Elaboration of the ketol moiety in thus obtained adducts allows a fast entry to not only
A highly diastereoselective P-Michael addition of chiral aminophosphinic acids to achiral acrylates has been developed, leading to phosphinic dipeptideisosteres in high yields and dr of up to >50:1. The method allows for the diastereoselective preparation of target compounds without the need for chiral auxiliaries or P-chiral substrates. A possible mechanistic explanation involves a domino chirality
已开发出手性氨基次膦酸与非手性丙烯酸酯的高度非对映选择性 P-Michael 加成反应,可产生高产率的次膦二肽电子等排体,dr 高达 >50:1。该方法允许非对映选择性制备目标化合物,而不需要手性助剂或 P-手性底物。一种可能的机制解释涉及从氨基次膦酸到 P 中心的多米诺骨牌手性转移,通过关键的二苯甲基酯基团放大,然后转移到 α-碳。