A green approach to the synthesis of chalcones via Claisen-Schmidt condensation reaction using cesium salts of 12-tungstophosphoric acid as a reusable nanocatalyst
作者:Ezzat Rafiee、Farzaneh Rahimi
DOI:10.1007/s00706-012-0814-5
日期:2013.3
AbstractThe catalytic efficacy of different cesium salts of 12-tungstophosphoric acid as nanocatalysts was checked in Claisen-Schmidt condensation of aldehydes and ketones under solvent-free conditions to produce chalcones. The reaction is fast and environmentally benign with excellent selectivity for the synthesis of chalcones. Results of potentiometric titration and catalytic reactivity of the catalysts
Synthesis of new spirooxindole-pyrrolothiazole derivatives: Anti-cancer activity and molecular docking
作者:Gehad Lotfy、Mohamed M. Said、El Sayed H. El Ashry、El Sayed H. El Tamany、Abdullah Al-Dhfyan、Yasmine M. Abdel Aziz、Assem Barakat
DOI:10.1016/j.bmc.2017.01.014
日期:2017.2
afforded new di-spiro heterocycles incorporating pyrrolidine and oxindole rings in quantitative yields and chemo-, regio-, and stereoselectively. The newly synthesized compounds were characterized using spectroscopic techniques. Furthermore, the molecular structures of 4a, 4e, and 4n were confirmed by X-ray crystallography. These newly synthesized compounds were screened for their in vitro activity against
Chalcone and its analogs as agents for the inhibition of angiogenesis and related disease states
申请人:Bowen J. Phillip
公开号:US20090018167A1
公开(公告)日:2009-01-15
The present invention relates to chalcone and chalcone derivatives and analogs which are useful as angiogenesis inhibitors. The present compounds, which are inexpensive to synthesize, exhibit unexpectedly good activity as angiogenesis inhibitors. The present invention also relates to the use of chalcone and its analogs as antitumor/anticancer agents and to treat a number of conditions or disease states in which angiogenesis is a factor, including angiogenic skin diseases such as psoriasis, acne, rosacea, warts, eczema, hemangiomas, lymphangiogenesis, among numerous others, as well as chronic inflammatory disease such as arthritis.
Compound having chiral spirobiindane skeleton and preparation method therefor
申请人:ZHEJIANG JIUZHOU PHARMACEUTICAL CO., LTD.
公开号:US11325875B2
公开(公告)日:2022-05-10
Chiral spirobiindane skeleton compound and preparation method thereof is disclosed in the present invention. The spirobiindane skeleton compound of the present invention having the structure formula of I or I′; the preparation method for synthesizing the spirobiindane skeleton compound of the present invention comprising the following steps: in the presence of solvent and catalysts, the structure formula compound III reacted through intramolecular Friedel-Crafts reaction to obtain the compound of formula I; the catalyst is a Browsteric acidor Lewis acid. The preparation method of chiral fused spirobiindane skeleton compound of the present invention does not need to adopt chiral starting materials or chiral resolving agents, does not require chiral resolving steps, is simple in method, is simple in post-treatment, and is economic and environment friendly. High product yield, high product optical purity and chemical purity. The catalyst for the asymmetric reaction is obtained from the chiral spirobiindane skeleton ligand of the present invention, under the catalytic reagent of transition metal, the catalyzed hydrogenation reaction can arrive at a remarkable catalytic effect with a product yield of >99%, and a product ee value of up to >99%.
[EN] COMPOUND HAVING CHIRAL SPIROBIINDANE SKELETON AND PREPARATION METHOD THEREFOR<br/>[FR] COMPOSÉ PRÉSENTANT UN SQUELETTE SPIROBIINDANE CHIRAL ET SON PROCÉDÉ DE PRÉPARATION<br/>[ZH] 手性螺二氢茚骨架化合物及其制备方法