H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub>/SiO<sub>2</sub>: An Eco-Friendly Alternative for the Stereo-, Regio- and Chemoselective Claisen-Schmidt Condensation
作者:Bibi Fatemeh Mirjalili、Zahra Zaghaghi
DOI:10.1002/jccs.200800104
日期:2008.6
H 3 PW 12 O 40 /SiO 2 or (PW/SiO 2 ) promotes the regio-, stereo- and chemoselectiveClaisen-Schmidtcondensation with improved yields.
H 3 PW 12 O 40 /SiO 2 或 (PW/SiO 2 ) 促进了区域选择性、立体选择性和化学选择性的 Claisen-Schmidt 缩合,并提高了产率。
5-Bis-(2,6-difluoro-benzylidene) Cyclopentanone Acts as a Selective 11β-Hydroxysteroid Dehydrogenase one Inhibitor to Treat Diet-Induced Nonalcoholic Fatty Liver Disease in Mice
作者:Hongguo Guan、Yiyan Wang、Huitao Li、Qiqi Zhu、Xiaoheng Li、Guang Liang、Ren-Shan Ge
DOI:10.3389/fphar.2021.594437
日期:——
Background: 11β-Hydroxysteroiddehydrogenase one is responsible for activating inert glucocorticoid cortisone into biologically active cortisol in humans and may be a novel target for the treatment of nonalcoholic fatty liver disease. Methods: A series of benzylidene cyclopentanone derivatives were synthesized, and the selective inhibitory effects on rat, mouse and human11β-hydroxysteroiddehydrogenase one
aromatic aldehydes undergoes crossed aldol condensation with ketones in the presence of a catalytic amount of Yb(OTf) 3 under solvent-free conditions to afford the corresponding α,α'-bis(substitutedbenzylidene)cycloalkanones in excellent yields without occurrence of any side reactions. This method is very general, simple and environmental friendly in contrast with the existing methods, which use many
Abstract Bromodimethylsulfonium bromide (BDMS)–catalyzed crossed aldol condensation between aromatic aldehydes and ketones is reported to access α,α′-bis(arylmethylidene) cycloalkanones at room temperature in good yields within 3–10 min. The salient features of this method are the simplicity of the procedure, the ready accessibility of the catalyst, and greater yields in relatively short reaction times
Synthesis of 2‐Aminopyran Derivatives and 3‐Arylpropionitrile Derivatives Catalyzed by KF/Al<sub>2</sub>O<sub>3</sub>
作者:Xiang‐shan Wang、Da‐qing Shi、Ya Du、Yan Zhou、Shu‐jiang Tu
DOI:10.1081/scc-120030692
日期:2004.12.31
A series of 2-cyano-3-aryl-3-(3,4-dihydro-1(2H)-naphthalene-one-2-yl) propionitrile derivatives and 2-aminopyran derivatives were synthesized by the KF-Al2O3-catalyzed reaction of malononitrile with 2-arylmethylidene-3,4-dihydro-1(2H)-naphthalenone, 2,6-biarylmethylidene cyclohexanone, or 2,5-biarylmethylidene cyclopenanone in DMF at room temperature. The structure of the later was confirmed by x-ray analysis.