A new synthesis of alkyl (E)-(3-dimethylamino)acrylates
摘要:
A highly stereoselective one-step method for the synthesis of alkyl (E)-(3-dimethylamino)acrylates from N,N-dimethylformamide and ketene acetals is reported. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] CONTROLLED DRUG RELEASE FROM SOLID SUPPORTS<br/>[FR] SUPPORTS SOLIDES POUR LA LIBÉRATION CONTRÔLÉE DE MÉDICAMENTS
申请人:PROLYNX LLC
公开号:WO2011140392A1
公开(公告)日:2011-11-10
The invention relates to solid supports useful in medical applications that provide controlled release of drugs, such as peptides, nucleic acids and small molecules. The drugs are covalently coupled to the solid support through a linkage that releases the drug or a prodrug through controlled beta elimination.
[EN] CONTROLLED RELEASE FROM MACROMOLECULAR CONJUGATES<br/>[FR] LIBÉRATION CONTRÔLÉE À PARTIR DE CONJUGUÉS MACROMOLÉCULAIRES
申请人:PROLYNX LLC
公开号:WO2011140393A1
公开(公告)日:2011-11-10
The invention relates to conjugates of macromolecular carriers and drugs comprising linkers that release the drug or a prodrug through rate-controlled beta-elimination, and methods of making and using the conjugates.
An efficient RhII -catalyzed synthesis of functionalized α-vinyl aldehydes with high E/Z stereoselectivity was developed. The reaction mediates the cyclopropanation of enaminones with vinyl carbenoids that are generated from cyclopropenes in situ to give the aminocyclopropane intermediates. Selective C-C bond cleavage of the cyclopropane intermediates leads to formation of α-vinyl aldehyde derivatives
Synergistic Indium and Silver Dual Catalysis: A Regioselective [2 + 2 + 1]-Oxidative <i>N</i>-Annulation Approach for the Diverse and Polyfunctionalized <i>N</i>-Arylpyrazoles
作者:Raju S. Thombal、Yong Rok Lee
DOI:10.1021/acs.orglett.8b02008
日期:2018.8.3
Indium(III)/silver(I)-catalyzed [2 + 2 + 1] annulation of arylhydrazine hydrochlorides with β-enamino esters via multicomponent reactions for the construction of diverse and multisubstituted N-arylpyrazoles has been demonstrated. The oxidative cycloaddition proceeds via a cascade triple Michael addition/elimination/air oxidation. This novel protocol provides a rapid and efficient synthetic route to
A direct and regiocontrolled thiolation method to access β-amino sulfides through the palladium-catalyzed C(sp2)–H functionalization of stable enamines was described. The reaction was realized under mild conditions by adding an external phosphine ligand to prevent poisoning of the palladium catalyst by the sulfuric reagents. A possible mechanism was proposed according to the obtained results. The DFT
描述了一种通过钯催化的稳定烯胺的 C(sp2)-H 官能化获得 β-氨基硫化物的直接和区域控制的硫醇化方法。该反应在温和条件下通过添加外部膦配体来实现,以防止钯催化剂被硫酸试剂中毒。根据所得结果提出了一种可能的机制。DFT 计算结果与实验数据一致,给出了 β-氨基硫化物的 E 异构体。该反应也以克规模进行,并显示出在有机合成中的潜在应用。