Stereoselective epoxidation of 2-arylidene-1-indanones and 2-arylidene-1-benzosuberones
摘要:
Oxidation of the (E) and (Z) isomers of 2-arylidene-1-indanones (1) and 2-arylidene-1-benzosuberones (4) by alkaline hydrogen peroxide (method i) afforded the spiroepoxides trans-2a-g and trans-5a-g from both isomers as sole products in high yields. On the other hand, dimethyldioxirane epoxidation (method ii) of the (E) isomers 1a-g and 4a-g gave the corresponding trans spiroepoxides in good yields, whereas the (Z) isomers 1a, c, e and 4a, c, e led to the cis spiroepoxides in moderate yields. Dimethyldioxirane oxidation (method ii) of (Z)-1c and (Z)-4c, e gave diones 3c and 6c, e as by-products as well. Epoxidation of(Z)-1a, c, e and (Z)-4a, c, e by m-chloroperoxybenzoic acid (method iii) resulted in ca. 6:1 mixtures of cis-2a, c, e and trans-2a, c, e or cis-5a, c, e and trans-5a, c, e spiroepoxides.
Superfast synthesis, antibacterial and antifungal studies of halo-aryl and heterocyclic tagged 2,3-dihydro-1H-inden-1-one candidates
作者:Rahul A. Shinde、Vishnu A. Adole、Bapu S. Jagdale、Thansing B. Pawar
DOI:10.1007/s00706-021-02772-0
日期:2021.6
activities against two Gram-positive (Staphylococcus aureus and Bacillus subtilis) and two Gram-negative bacteria (Escherichia coli and Proteus vulgaris), and also two fungal agents (Aspergillus niger and Candida albicans). Most of the compounds were found to exert potentantibacterial action with broad-spectrum antibacterial activity. Likewise, few compounds were revealed to have potent antifungal properties
我们描述了卤代芳基和杂环标记的2,3-二氢-1 H-茚满一酮衍生物的成功合成,以及它们的抗菌和抗真菌特性。通过研磨,搅拌和超声辐照方法合成了来自2,3-二氢-1 H-茚基-1-一的总共15种衍生物。这些发现表明,超声技术在时间和合成性能方面越来越令人满意。测试了合成的化合物对两种革兰氏阳性菌(金黄色葡萄球菌和枯草芽孢杆菌)和两种革兰氏阴性菌(大肠杆菌和寻常变形杆菌)以及两种真菌剂的抗菌活性。黑曲霉和白色念珠菌)。发现大多数化合物都具有强大的抗菌作用,并具有广谱抗菌活性。同样,几乎没有化合物显示出对黑曲霉和白色念珠菌具有有效的抗真菌特性。通过FT-IR,1 H NMR,13 C NMR和HRMS光谱技术对合成的化合物进行表征。 图形摘要
[EN] COMPOUNDS AND METHODS FOR TREATING OR PREVENTING HEART FAILURE<br/>[FR] COMPOSÉS ET MÉTHODES DE TRAITEMENT OU DE PRÉVENTION D'INSUFFISANCE CARDIAQUE
申请人:UNIV DREXEL
公开号:WO2020146636A1
公开(公告)日:2020-07-16
The present invention relates to the discovery of novel compounds that can be used to treat and/or prevent heart failure in a subject. In certain embodiments, the compounds of the invention are sulfide: quinone oxidoreductase (SQOR) inhibitors. In other embodiments, the compounds of the invention increase physiological levels of H2S in the subject. In yet other embodiments, administration of the compounds of the invention treats and/or prevents hypertension, and/or atherosclerosis, and/or pathological cardiac remodeling that leads to heart failure in the subject.
spiroheterocycles are considered as emerging drug candidates, synthesis of spiroaziridines has not been well explored so far. Herein, we disclose an efficient I2/TBHP mediated diastereoselectivesynthesis of N-alkyl spiroaziridines from primary amines and easily accessible α,β-unsaturated ketones. The reaction is also compatible for the synthesis of 2-aroylaziridines.
Catalytic enantioselective cascade Michael/cyclization reaction of 3-isothiocyanato oxindoles with exocyclic α,β-unsaturated ketones en route to 3,2′-pyrrolidinyl bispirooxindoles
作者:Satavisha Kayal、Santanu Mukherjee
DOI:10.1039/c6ob02187e
日期:——
Cascade Michael/cyclization reactions between 3-isothiocyanato oxindoles and exocyclic α,β-unsaturated ketones are shown to proceed efficiently in the presence of a quinine-derived tertiary amino-squaramide catalyst and furnish 3,2′-pyrrolidinyl bispirooxindoles containing two spiro-quaternary and three contiguous stereocenters as a single diastereomer with excellent enantioselectivities (up to 99 : 1
(E)-2-Benzylidenebenzocyclanones: part XIII—(E)/(Z)-Isomerization of some cyclic chalcone analogues. Effect of ring size on lipophilicity of geometric isomers
作者:Pál Perjési
DOI:10.1007/s00706-015-1463-2
日期:2015.8
high-performance liquid chromatography (RP-HPLC) method was developed for separation of the respective (E) and (Z) isomers of the cyclic chalcone analogues (E)-2-(4′-X-benzylidene)-1-indanones, -tetralones, and -benzosuberones. The method has been applied to monitor progress of the light-induced (E)/(Z) isomerization process in the three series. Data indicate formation of equilibrium mixtures of the respective