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公开(公告)号:US09302970B2
公开(公告)日:2016-04-05
申请号:US14374338
申请日:2013-01-25
申请人: Ravindra Dattatray Aher , Madhuri Hanumant Gade , Reddy Santhosh Rekula , Pratibha Uttam Karabal , Gurunath Mallappa Suryavanshi , Arumugam Sudalai
发明人: Ravindra Dattatray Aher , Madhuri Hanumant Gade , Reddy Santhosh Rekula , Pratibha Uttam Karabal , Gurunath Mallappa Suryavanshi , Arumugam Sudalai
IPC分类号: C07C51/15
摘要: The invention provides a simple, efficient, environmentally friendly catalytic system for direct carboxylation reactions using CO2 under mild conditions. A single step heterogeneous catalytic process for preparation of alkynyl carboxylic acids is disclosed.
摘要翻译: 本发明提供了在温和条件下使用CO 2的直接羧化反应的简单,有效,环保的催化体系。 公开了用于制备炔基羧酸的单步非均相催化方法。
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公开(公告)号:US08440844B2
公开(公告)日:2013-05-14
申请号:US13273022
申请日:2011-10-13
申请人: Varun Rawat , Pandurang Vilasrao Chouthaiwale , Vilas Bhiku Chavan , Gurunath Mallappa Suryavanshi , Arumugam Sudalai
发明人: Varun Rawat , Pandurang Vilasrao Chouthaiwale , Vilas Bhiku Chavan , Gurunath Mallappa Suryavanshi , Arumugam Sudalai
IPC分类号: C07D333/34
CPC分类号: C07D333/34
摘要: A high-yielding enantioselective synthesis of the bioactive (S)—N-(5-chlorothiophene-2-sulfonyl)-β,β-diethylalaniol (7.b.2), a Notch-1-sparing γ-secretase inhibitor metabolite (with EC50=28 nM) effective in reduction of Aβ production in vivo, has been realized starting from readily available 3-pentanone. The key steps of the synthesis are proline-catalyzed α-aminooxylation and α-amination of aldehyde; the latter contributing an overall yield of 50-75% and 90-99% enantiomeric excess.
摘要翻译: 生物活性(S)-N-(5-氯噻吩-2-磺酰基) - ,β-二乙基丙二醇(7.b.2),Notch-1缺乏的γ-分泌酶抑制剂代谢产物 EC50 = 28nM)有效降低体内Abeta产生,已经从容易获得的3-戊酮开始实现。 合成的关键步骤是醛的脯氨酸催化α-氨基氧化和α-胺化; 后者的总产率为50-75%和90-99%对映体过量。
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公开(公告)号:US06765076B2
公开(公告)日:2004-07-20
申请号:US10102542
申请日:2002-03-20
IPC分类号: C08F430
CPC分类号: C08F4/18
摘要: Transition metal superoxides of formula M(O2)n, where M is a transition metal and n is equal to the valence of M, may be used as initiators for free radical polymerization, optionally, under conditions of living polymerization, with or without chain transfer agents. Polymers produced have a narrow molecular weight distribution and low polydispersity indexes when chain transfer agents and/or molecular weight controlling agents are used.
摘要翻译: 式M(O 2)n的过渡金属超氧化物,其中M是过渡金属,n等于M的化合价,可以用作自由基聚合的引发剂,任选地,在活性聚合条件下,有或没有链转移 代理商 当使用链转移剂和/或分子量控制剂时,生产的聚合物具有窄的分子量分布和低的多分散指数。
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