نتایج جستجو برای: claisen schmidt condensation

تعداد نتایج: 40665  

2009
Huan-Mei Guo Le-Qing Liu Jie Yang Fang-Fang Jian

The title compound, C(16)H(13)NO(4), was prepared from 2-nitrylhypnone [systematic name: 1-(2-nitrophenyl)ethanone] and 4-methoxy-benzophenone by a Claisen-Schmidt condensation. The dihedral angle formed by the two benzene rings is 80.73 (2). The crystal packing is stabilized by inter-molecular C-H⋯O hydrogen bonds.

2009
Huan-Mei Guo

The title compound, C(16)H(13)FO(2), was prepared from 4-methoxy-hypnone and 2-fluoro-benzophenone by a Claisen-Schmidt condensation reaction. The dihedral angle between the two benzene rings is 31.99 (2)°. In the crystal structure, mol-ecules are linked by weak inter-molecular C-H⋯O hydrogen bonds along [010].

2006
Xueguang Wang Soofin Cheng

Flavanone was synthesized through the Claisen–Schmidt condensation between benzaldehyde and acetophenone and subsequent intramolecular Michael addition over aminopropyl-functionalized SBA-15 materials. The catalysts with well-ordered hexagonally arranged mesopores were synthesized by one-pot co-condensation of tetraethoxysilane and aminopropyltriethoxysilane using amphiphilic block copolymer as...

Journal: :Molecules 2012
Graziele D da Silva Marina G da Silva Estrela M P V E Souza Andersson Barison Sarah C Simões Fernando P Varotti Leandro A Barbosa Gustavo H R Viana José A F P Villar

A series of new chalcones substituted with azide/triazole groups were designed and synthesized, and their cytotoxic activity was evaluated in vitro against the HeLa cell line. O-Alkylation, Claisen-Schmidt condensation and Cu(I)-catalyzed cycloaddition of azides with terminal alkynes were applied in key steps. Fifteen compounds were tested against HeLa cells. Compound 8c was the most active mol...

2011
IVA T. TODOROVA DANIELA I. BATOVSKA BISTRA A. STAMBOLIYSKA STOYAN P. PARUSHEV

Sixteen hydroxychalcones were synthesized in sufficient purity by the Claisen–Schmidt condensation between appropriate acetophenones and aromatic aldehydes. All the compounds were evaluated for their ability to scavenge the stable free 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical. Important structure–activity relationships were observed that strongly contribute to the knowledge for the design o...

Journal: :Molecules 2014
Xin Gu Xiaoyan Wang Fengtian Wang Hongbao Sun Jie Liu Yongmei Xie Mingli Xiang

An efficient method for the facile synthesis of (E)-monoarylidene derivatives of homo- and heterocyclic ketones with various aldehydes in the presence of a pyrrolidine organocatalyst has been achieved. A range of α,β-unsaturated ketones were obtained in moderate to high yields (up to 99%). Unlike the Claisen-Schmidt condensation process, the formation of undesired bisarylidene byproducts is not...

Journal: :International journal of chemistry and technology 2022

A series of E-4-(3-oxo-3-(substituted)prop-1-en-1-yl)benzoic acid derivatives (1-5) were synthesized by the Claisen-Schmidt condensation various ketones with 4-formylbenzoic acid. The anticholinesterase (AChE and BChE), tyrosinase, urease inhibition activities compounds examined. It was found that most active compound against AChE enzyme in activity 1. Compound 4 tyrosinase activity, while 3 ps...

Journal: :International Journal for Research in Applied Science and Engineering Technology 2018

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