Building Heterocyclic Systems with RC(OR)2+ Carbocations in Recyclable Brønsted Acidic Ionic Liquids: Facile Synthesis of 1-Substituted 1H-1,2,3,4-Tetrazoles, Benzazoles and Other Ring Systems with CH(OEt)3 and EtC(OEt)3 in [EtNH3][NO3] and [PMIM(SO3H)][O
作者:Gopalakrishnan Aridoss、Kenneth K. Laali
DOI:10.1002/ejoc.201100128
日期:2011.5
IL-1/CH(OEt) 3 . The latter was also formed from 2-aminobenzoic acid in IL-1/CH(OEt) 3 . Mechanistic implications are addressed. The reported protocols enable rapid assembly of a host of heterocyclic systems in high yields with the added advantage of recycling and reuse of the ILs.
Visible-light driven regioselective synthesis of 1<i>H</i>-tetrazoles from aldehydes through isocyanide-based [3 + 2] cycloaddition
作者:Fooleswar Verma、Anjumala Sahu、Puneet K. Singh、Ankita Rai、Manorama Singh、Vijai K. Rai
DOI:10.1039/c8gc01321g
日期:——
A novel and green Co@g-C3N4 catalyzed visible light driven direct regioselective synthesis of 1H-tetrazoles directly from various aldehydes and sodium azide is reported. Herein, NaN3 not only behaves as a three-nitrogen donor of the tetrazole ring but also it converts aldehyde into isocyanide as a one-nitrogen source. The regioselectivity of the product, operational simplicity, ambient reaction conditions
报道了新颖的和绿色的Co @ gC 3 N 4催化可见光驱动的直接由各种醛和叠氮化钠直接区域选择性合成1 H-四唑。在此,NaN 3不仅起到四唑环的三氮供体的作用,而且还将醛转化成作为一氮源的异氰酸酯。产品的区域选择性,操作简便,环境反应条件,不使用柱色谱法进行纯化,优异的产品收率(84–95%)和催化剂的可回收性高达五倍,而形态和催化效率没有任何实质性变化是所设想协议的显着特征。
Highly efficient synthesis of 1- and 5-substituted 1H-tetrazoles using chitosan derived magnetic ionic liquid as a recyclable biopolymer-supported catalyst
作者:Ali Khalafi-Nezhad、Somayeh Mohammadi
DOI:10.1039/c3ra23107k
日期:——
A general method for the efficient synthesis of 1- and 5-substituted1H-tetrazoles from nitriles and amines is described using chitosan supported magnetic ionic liquid nanoparticles (CSMIL) as a novel heterogeneous catalyst. The application of this catalyst allows the synthesis of a variety of tetrazoles in high yields at low temperature. This new magnetic catalyst has been prepared from chitosan (the
[EN] INHIBITORS OF THE RENAL OUTER MEDULLARY POTASSIUM CHANNEL<br/>[FR] INHIBITEURS DU CANAL POTASSIQUE MÉDULLAIRE EXTERNE RÉNAL
申请人:MERCK SHARP & DOHME
公开号:WO2015105736A1
公开(公告)日:2015-07-16
The present invention provides compounds of Formula (I) and the pharmaceutically acceptable salts thereof, which are inhibitors of the ROMK (Kir1.1) channel. The compounds may be used as diuretic and/or natriuretic agents and for the therapy and prophylaxis of medical conditions including cardiovascular diseases such as hypertension, heart failure and chronic kidney disease and conditions associated with excessive salt and water retention.
INHIBITORS OF THE RENAL OUTER MEDULLARY POTASSIUM CHANNEL
申请人:Merck Sharp & Dohme Corp.
公开号:US20170037037A1
公开(公告)日:2017-02-09
The present invention provides compounds of Formula (I) and the pharmaceutically acceptable salts thereof, which are inhibitors of the ROMK (Kir1.1) channel. The compounds may be used as diuretic and/or natriuretic agents and for the therapy and prophylaxis of medical conditions including cardiovascular diseases such as hypertension, heart failure and chronic kidney disease and conditions associated with excessive salt and water retention.