Non-natural 2<i>H</i>-azirine-2-carboxylic acids: an expedient synthesis and antimicrobial activity
作者:Pavel A. Sakharov、Alexander N. Koronatov、Alexander F. Khlebnikov、Mikhail S. Novikov、Artem G. Glukharev、Elizaveta V. Rogacheva、Liudmila A. Kraeva、Vladimir V. Sharoyko、Tatiana B. Tennikova、Nikolai V. Rostovskii
DOI:10.1039/c9ra09345a
日期:——
Non-natural 2H-azirine-2-carboxylic acids were obtained in high yields by FeCl2-catalyzed isomerization of 5-chloroisoxazoles to azirine-2-carbonyl chlorides followed by their hydrolysis. The 3-aryl- and 3-heteroaryl-substituted acids are stable during prolonged storage, exhibit antibacterial activity against ESKAPE pathogens and show a low level of cytotoxicity.
An isoxazole strategy for the synthesis of alkyl 5-amino-4-cyano-1<i>H</i>-pyrrole-2-carboxylates – versatile building blocks for assembling pyrrolo-fused heterocycles
作者:Anastasiya V. Agafonova、Liya D. Funt、Mikhail S. Novikov、Alexander F. Khlebnikov
DOI:10.1039/d1ob00053e
日期:——
malononitrile under Fe(II) catalysis. Alkyl 5-amino-4-cyano-1H-pyrrole-2-carboxylates are excellent building blocks for various annulation reactions, leading to new derivatives of 1H-pyrrolo[1,2-a]imidazole and pyrrolo[2,3-d]pyrimidine. The DFT calculations of mechanistic details of alkyl 5-amino-4-cyano-1H-pyrrole-2-carboxylate formation are presented.
已经开发了一种完全原子经济的多米诺骨牌方法,该方法通过在Fe(II)催化下,将5烷氧基异恶唑与丙二腈进行反硝化来制备5-氨基-4-氰基-1 H-吡咯-2-羧酸烷基酯。5-氨基-4-氰基-1 H-吡咯-2-羧酸烷基酯是各种环化反应的极好基石,从而导致了1 H-吡咯并[1,2- a ]咪唑和吡咯并[2,3-的新衍生物d ]嘧啶。提出了5-氨基-4-氰基-1 H-吡咯-2-羧酸烷基酯形成机理的DFT计算方法。
作者:Timur O. Zanakhov、Ekaterina E. Galenko、Mikhail S. Novikov、Alexander F. Khlebnikov
DOI:10.1021/acs.joc.3c01413
日期:2023.9.15
by Cu(OTf)2. The hydroxyl group of alkyl 5/4-hydroxy-3H-benzo[e]indole-4/5-carboxylates, through the formation of the corresponding triflates, allows the introduction of various substituents into the 5/4 position of benzo[e]indoles using the cross-coupling reaction and even form a new heterocyclic backbone, benzo[k]pyrrolo[2,3-i]phenanthridine, via a tandem Suzuki reaction/nucleophilic acyl substitution
开发了一种针对 5/4-羟基-3 H-苯并[ e ]吲哚-4/5-羧酸烷基酯的不同重氮方法。在 Co(acac) 3或 Ni(acac) 2催化下,1,3-二酮与 2-重氮-3-氧代-3-(2 H -azirin-2-yl)丙酸烷基酯反应,得到各种烷基 3-( 1 H-吡咯-2-基)-2-重氮-3-氧代丙酸酯的产率良好。后者经历沃尔夫重排,然后对瞬时乙烯酮进行 6π 环化,形成 5-羟基-3 H-苯并[ e ]吲哚-4-羧酸烷基酯,在 1、2、7 和 8 位上带有各种取代基,以及4-羟基-6 H-噻吩并[2,3- e ]吲哚-5-甲酸甲酯和5-羟基-7 H-苯并[ c ]咔唑-6-甲酸甲酯在热解或Rh 2 (OAc) 4下的衍生物催化。异构苯并吲哚,烷基4-羟基-3H-苯并[ e ]吲哚-5-羧酸酯,通过对烷基3-(1H-吡咯-2-基)-2-重氮基的吡咯氮进行Boc保护来制备-3-氧代丙酸酯,然后在
Discovery of a nonpeptidic small molecule antagonist of the human platelet thrombin receptor (PAR-1)
作者:Philippe G Nantermet、James C Barrow、George F Lundell、Janetta M Pellicore、Kenneth E Rittle、MaryBeth Young、Roger M Freidinger、Thomas M Connolly、Cindra Condra、Jerzy Karczewski、Rodney A Bednar、Stanley L Gaul、Robert J Gould、Kris Prendergast、Harold G Selnick
DOI:10.1016/s0960-894x(01)00745-4
日期:2002.2
The synthesis and biological evaluation of a series of nonpeptidic small molecule antagonists of the human platelet thrombin receptor (PAR-1) are described. Optimization of the 5-amino-3-arylisoxazole lead resulted in an approximate 100-fold increase in potency. The most potent of these compounds (54) inhibits platelet activation with IC50S of 90 nM against the thrombin receptor agonist peptide (TRAP) and 510 nM against thrombin as the agonist. Further, antagonist 54 fully blocks platelet aggregation stimulated by 1 nM thrombin for 10 min. (C) 2002 Published by Elsevier Science Ltd.
2<i>H</i>-Azirine-2-carbonyl Azides: Preparation and Use as N-Heterocyclic Building Blocks
作者:Liya D. Funt、Yulia V. Krivolapova、Olesya V. Khoroshilova、Mikhail S. Novikov、Alexander F. Khlebnikov
DOI:10.1021/acs.joc.9b03367
日期:2020.3.20
2H-Azirine-2-carbonyl azides, new reactive heterocyclic building blocks, were synthesized in high yield by the reaction of sodium azide with 2H-azirine-2-carbonyl chlorides, generated by Fe(II)-catalyzed isomerization of 5-chloroisoxazoles. 2-(Azidocarbonyl)-1H-pyrroles, prepared by the Ni(II)-catalyzed reaction of 2-(azidocarbonyl)-2H-azirines with 1,3-diketones easily undergo the Curtius rearrangement