Vanadium(IV) acetylacetonate catalyzed stereoselective synthesis of β-enaminoesters and β-enaminones
作者:Rajibul A. Laskar、Naznin A. Begum、Mohammad Hedayetullah Mir、Shahzad Ali、Abu T. Khan
DOI:10.1016/j.tetlet.2012.11.051
日期:2013.1
and stereoselective procedure has been described for the synthesis of a series of β-enaminoesters and β-enaminones by vanadium(IV) acetylacetonate [VO(acac)2] catalyzed reaction of β-ketoesters and 1,3-diketones with both aliphatic and aromatic amines. X-ray crystallographicstudies of some representative compounds corroborate two types of structural geometry formed by inter-molecular as well as intra-molecular
Efficient Synthesis of Pyrazoles: Oxidative CC/NN Bond-Formation Cascade
作者:Julia J. Neumann、Mamta Suri、Frank Glorius
DOI:10.1002/anie.201002389
日期:2010.10.11
Golden section: A novel synthetic strategy for the synthesis of tetrasubstituted pyrazoles is provided. In an efficient CC/NNbond‐formation cascade, enamines and nitriles are oxidatively coupled to deliver pyrazoles in good yields (see scheme). The ready availability of the starting materials, the high level of practicability of the reaction and work up, and the avoidance of hydrazine starting materials
黄金部分:提供了一种合成四取代吡唑的新颖合成策略。在有效的C CC / NN键形成级联反应中,烯胺和腈氧化偶联以高产率提供吡唑(请参阅方案)。起始原料的容易获得,反应和后处理的高度实用性以及避免使用肼起始原料,使得该方法具有吸引力。
Ca(CF3COO)2: An efficient Lewis acid catalyst for chemo- and regio-selective enamination of β-dicarbonyl compounds
作者:Mohamed Anoir Harrad、Rachid Outtouch、Mustapha Ait Ali、Larbi El Firdoussi、Abdallah Karim、Alain Roucoux
DOI:10.1016/j.catcom.2009.11.019
日期:2010.1
A relevant procedure has been developed for the synthesis of β-enaminoesters catalysed by Ca(CF3COO)2. The reaction of β-ketoesters with primary amines was efficiently carried out under solvent-free conditions at room temperature and led to chemo- and regio-selective formations of enamine derivatives in high yields.
PYRAZOLE SYNTHESIS BY COUPLING OF CARBOXYLIC ACID DERIVATIVES AND ENAMINES
申请人:Neumann Julia
公开号:US20130012715A1
公开(公告)日:2013-01-10
The invention describes a novel process for synthesizing pyrazoles by means of oxidative conversion of enamines with suitable N-containing carboxylic acid derivatives.
这项发明描述了一种通过将烯胺与适当的含氮羧酸衍生物进行氧化转化来合成吡唑的新型过程。
Pyrazole synthesis by coupling of carboxylic acid derivatives and enamines
申请人:Neumann Julia
公开号:US08716485B2
公开(公告)日:2014-05-06
The invention describes a novel process for synthesizing pyrazoles by means of oxidative conversion of enamines with suitable N-containing carboxylic acid derivatives.