7600-00-2Relevant articles and documents
Facile Synthesis of Azaarene-Substituted Hydroxycoumarins Possessing High Biological Activities via Three-Component C(sp3)-H Functionalization
Dong, Haoxun,Xu, Lubin,Li, Shuai-Shuai,Wang, Liang,Shao, Chang-Lun,Xiao, Jian
, p. 604 - 610 (2016)
An unprecedented three-component C(sp3)-H functionalization of 2-alkylazaarenes with aryl aldehydes and 4-hydroxycoumarins was realized, providing azaarene-substituted 3-benzyl-4-hydroxycoumarins in good to excellent yields. These new target compounds displayed broad-spectrum antibacterial activities, providing a new type of antibacterial skeleton.
Twinned crystal structure of bis(2-hydroxy-4,4-dimethyl-6-oxo-1-cyclohexenyl)phenylmethane at 150 K
Bolte, Michael,Degen, Alexander,Ruehl, Stephan
, p. 340 - 342 (1997)
The title compound, 2,2′-(phenylmethylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-one), C23H28O4, forms tetragonal crystals twinned on (110). The two molecules in the asymmetric unit differ only in the conformation of on
One-pot two-step mechanochemical synthesis of arylsulfonyl 4H-pyrans
Cheng, Yue,Chu, Xiaohe,Huang, Qianqian,Jiang, Ling,Lu, Qingqing
, (2022/02/14)
In this paper, a simple and environment-friendly protocol was developed for the synthesis of arylsulfonyl 4H-pyrans via L-proline-catalyzed one-pot two-step reaction of aromatic aldehyde with phenylsulphonyl acetonitrile and dimedone under ball-milling conditions. Environmental acceptability, wide substrate scope, low cost and operational simplicity are the key features of this method.
2,2′-(Arylmethylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-enone) crystals formation via atom economy reaction and their antioxidant activity
Thakur, Deepa,Kaur, Manvinder,Malhi, Dharambeer Singh,Garg, Sonali,Sharma, Ajay,Sohal, Harvinder Singh
, p. 537 - 543 (2021/05/10)
Tetraketones with their diversified biological potencies became a highly significant class of oxygen-containing organic compounds. These are prepared by applying a simple Knoevenagel-Michael cascade procedure with 1,3-dicarbonyl compound and aldehydes. In
Montmorillonite KSF-Catalyzed Synthesis of 2,2′-(Arylmethylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-ones) for the Functionalization of MCM-41 Silica Nanoparticles
Mechi, L.,Mosbah, M. Ben,Moussaoui, Y.
, p. 1533 - 1539 (2021/10/26)
Abstract: A green protocol has been developed for the preparation of 2,2′-(arylmethylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-ones) following the multicomponent condensation reaction between aromatic alde-hydes and dimedone with excellent yields. The
Preparation and study of the catalytic application in the synthesis of xanthenedione pharmaceuticals of a hybrid nano-system based on copper, zinc and iron nanoparticles
Esmaeili, Mir Saeed,Varzi, Zahra,Taheri-Ledari, Reza,Maleki, Ali
, p. 973 - 996 (2020/11/06)
A novel efficiently mixed transition metal oxides catalytic system with high catalytic activity and heterogeneity constructed of copper and zinc oxide nanoparticles is presented. For preparation of this hybrid catalytic system, carrageenan as a natural polymeric matrix has been chosen to add biocompatibility to the heterogeneous catalyst. Then, the carrageenan textures have been magnetized through the composition with iron oxide nanoparticles. Copper and zinc metallic sites are employed as the main catalytic sites for catalyzing the synthesis of xanthenedione pharmaceutical derivatives from aldehyde and dimedone. Due to the magnetic behavior of the catalyst, the purification process is carried out with high convenience. Herein, a plausible mechanism for the catalytic process is suggested and reusability of the presented catalyst is also investigated. In this report, it has been well-proven that high reaction yields are obtained for xanthenedione derivatives under mild conditions, through applying the presented hybrid catalytic system.
On the enantioselective phosphoric-acid-catalyzed hantzsch synthesis of polyhydroquinolines
Bonne, Damien,Bressy, Cyril,Bugaut, Xavier,Constantieux, Thierry,Jean, Marion,Lemaitre, Clément,Quinonero, Ophélie,Rodriguez, Jean,Roussel, Christian,Vanthuyne, Nicolas
supporting information, p. 3394 - 3398 (2021/05/29)
A reinvestigation of a chiral phosphoric-acid-catalyzed four-component Hantzsch enantioselective synthesis of polyhydroquinolines reported in 2009 is presented. In our hands, when the reaction was performed with fidelity to the original report using a chiral enantiopure phosphoric acid catalyst, no enantioselectivity was observed. Unlike in the original report, enantioselectivity results are backed by baseline separation of the enantiomers by HPLC analyses on chiral stationary phase with UV and chiroptical detection.
Green synthesis of tetraketones: crystal structure, DFT studies and Hirshfeld surface analysis of 2,2′-((3,4-dimethoxyphenyl) methylene) bis(3-hydroxy-5,5-dimethylcyclohex2-enone)
Shashi,Begum, Noor Shahina,Panday, Anoop Kumar
, p. 81 - 97 (2021/02/09)
The present work deals with a practically efficient protocol designed for the synthesis of tetraketones using ultrasound in the presence of boric acid as the catalyst. One of the tetraketone, (3a) was confirmed by crystallographic studies. The molecules i
Enhanced catalytic activity of bio-fabricated ZnO NPs prepared by ultrasound-assisted route for the synthesis of tetraketone and benzylidenemalonitrile in hydrotropic aqueous medium
Attar, Suraj R.,Kamble, Santosh B.,Shinde, Bipin
, (2020/08/19)
Abstract: Mushroom-like mesoporous and hexagonal ZnO nanoparticles were synthesized from plant extract and chemical method respectively, by co-precipitation method in aqueous medium. Different morphological forms of ZnO NPs were characterized by XRD, TGA, FESEM, EDX, FTIR, UV–Vis and BET. Neem (Azadirachta indica) leaf extract and ultrasound irradiation have a crucial role in the formation of different morphologies of ZnO NPs. ZnO NPs synthesized from plant extract and hydrotrope show a synergistic effect that leads to efficient synthesis of benzylidenemalonitrile and tetraketone derivatives at room temperature in water. Simple preparation of the catalyst, excellent yields, reusability of catalyst with consistent activity and ease of product isolation are the most significant advantages of this green protocol. Graphic abstract: [Figure not available: see fulltext.]
Selective synthesis of spiro and dispiro compounds using Mn(III)-based oxidation of tetracarbonyl compounds
Hisano, Kazuki,Nishikawa, Satomi,Nishino, Hiroshi,Shibuya, Keisuke,Yokote, Suzuka
supporting information, (2020/04/21)
The Mn(III)-based oxidation of methylenebis(cyclohexanedione)s and methylenebis(piperidinedione)s as a tetracarbonyl compound was investigated under various conditions, selectively producing spiro dihydrofurans and dispiro cyclopropanes depending on the solvent. The mechanism for the formation of the spiro dihydrofurans and dispiro cyclopropanes was discussed. In addition, a simple synthesis of a new type of alkaloid, 3,4,6,7,8,10-hexahydro-1H-pyrano[3,2-c:5,6-c’]dipyridine-1,9(2H)-diones, was demonstrated.
