90-60-8Relevant articles and documents
Phosphine-catalyzed sequential (2+3)/(2+4) annulation of γ-vinyl allenoates: Access to the synthesis of chromeno[4,3-: B] pyrroles
Huang, You,Li, Xiaohu
supporting information, p. 9934 - 9937 (2021/10/12)
A phosphine-catalyzed cascade (2+3)/(2+4) cyclization reaction of γ-vinyl allenoates with aldimine esters has been developed to provide a series of chromeno[4,3-b]pyrrole derivatives that contain three contiguous stereogenic centers. The method gives a good yield, excellent chemoselectivity and diastereoselectivity under mild conditions.
Cytotoxicity of new pyridazin-3(2H)-one derivatives orchestrating oxidative stress in human triple-negative breast cancer (MDA-MB-468)
Bouchmaa, Najat,Ben Mrid, Reda,Boukharsa, Youness,Nhiri, Mohamed,Ait Mouse, Hassan,Taoufik, Jamal,Ansar, M'hammed,Zyad, Abdelmajid
, (2018/11/02)
Triple-negative breast cancer (TNBC) is a complex and aggressive subtype of breast cancer characterized by high morbidity and mortality. In the absence of targeted therapy, only chemotherapy is available in this case of cancer. The current study investigated the antitumor effect of new pyridazin-3(2H)-one derivatives on the human TNBC cell line, MD-MB-468. The in vitro cytotoxic activities were investigated using the tetrazolium-based MTT assay. Lipid peroxidation, H2O2 content, and the specific activities of antioxidant enzymes were also determined. Two molecules, 6f and 7h, were found to be selectively highly active against tumor cells with IC50 values of 3.12 and 4.9 μM, respectively. Furthermore, cells exposed to 6f showed a significant increase in H2O2 and lipid peroxidation levels, accompanied by a decrease in the enzyme activities of glutathione reductase (GR) and thioredoxin reductase (TrxR). The cytotoxicity of the compound 6f may improve the therapeutic efficacy of the current treatment for TNBC via the inhibition of GR and TrxR activities.
Design and synthesis of novel Vitamin D-coumarin hybrids using microwave irradiation
Zhang, Hengrui,Fang, Zhijie
, p. 684 - 687 (2018/01/08)
A series of novel vitamin D-coumarin hybrids were synthesised by esterification of the corresponding coumarin-3-carboxylic acids and vitamin D or vitamin D CD-ring alcohol in CH2Cl2 under microwave irradiation. They were obtained in higher yields (from 64-81% up to 79-87%) and shorter reaction time (from 3 h down to 15 min), compared with earlier conventional methodologies. The structures of all the target compounds were confirmed by 1H NMR, 13C NMR and HRMS. This provides an attractive and alternative method for the preparation of high-value vitamin D-coumarin hybrids.
Synthesis characterization and cytotoxicity studies of platinum(II) complexes with reduced amino pyridine schiff base and its derivatives as ligands
Li, Li-Jun,Yan, Qin-Qin,Liu, Guo-Jun,Yuan, Zhen,Lv, Zhen-Hua,Fu, Bin,Han, Yan-Jun,Du, Jian-Long
, p. 1081 - 1089 (2017/05/29)
A series of reduced amino pyridine Schiff base platinum(II) complexes were prepared as potential anticancer drugs, and characterized by NMR, IR spectroscopy, elemental analysis, and molar conductivity. UV and CD results showed the binding mode between these compounds and salmon sperm DNA may be intercalation. The cytotoxicity of these complexes was validated against A549, Hela, and MCF-7 cell lines by MTT assay. Some complexes exhibited better cytotoxic activity than cisplatin against Hela and MCF-7 cell lines.
NO-RELEASING NITROOXY-CHROMENE CONJUGATES
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Paragraph 0295; 0296, (2016/12/16)
The present invention provides NO-releasing nitrooxy-alkylenyl-linked-chromene conjugates, having the structure of Formula (1) wherein R1, R2, R3, R4, X, and L are as defined in the detailed description; pharmaceutical compositions comprising at least one compound o Formula (I); and methods useful for healing wounds, preventing and treating cancer and treating actinic keratosis, cystic fibrosis, and acne, using a compound of Formula (1).
NO-RELEASING NITROOXY-CHROMENE CONJUGATES
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Paragraph 0205; 0206, (2015/08/03)
The present invention provides NO-releasing nitrooxy-alkylenyl-linked-chromene conjugates, having the structure of Formula (1 ) wherein R1, R2, R3, R4, X, and L are as defined in the detailed description; pharmaceutical compositions comprising at least one compound o Formula (I); and methods useful for healing wounds, preventing and treating cancer and treating actinic keratosis, cystic fibrosis, and acne, using a compound of Formula (1).
NO-RELEASING NONOATE(OXYGEN-BOUND)CHROMENE CONJUGATES
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Paragraph 0204; 0205, (2015/08/03)
The present invention provides NO-releasing NONOate(oxygen bound)chromene conjugates, having the structure of Formula (I): wherein Z, R1, R2, R3, R4, R5, R6, and R7 are as defined in the detailed description; pharmaceutical compositions comprising at least one compound of Formula (I); and methods useful for healing wounds, preventing and treating cancer, or treating actinic keratosis, cystic fibrosis, or acne, using a compound of Formula (I).
NO-RELEASING GUANIDINE-CHROMENE CONJUGATES
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Paragraph 0263; 0264, (2015/07/22)
The present disclosure provides NO-releasing guanidine-chromene conjugates, having the structure of Formula (I): wherein R1, R2, R3, R4, R10, and L are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds of Formula (I); and methods useful for healing wounds, preventing and treating cancer, or treating actinic keratosis, cystic fibrosis, acne, or a disease mediated by arginine deficiency using a compound of Formula (I).
Cu-Mn spinel oxide catalyzed regioselective halogenation of phenols and N-heteroarenes
Singh, Parvinder Pal,Thatikonda, Thanusha,Kumar, K. A. Aravinda,Sawant, Sanghapal D.,Singh, Baldev,Sharma, Amit Kumar,Sharma,Singh, Deepika,Vishwakarma, Ram A.
scheme or table, p. 5823 - 5828 (2012/09/05)
A novel simple, mild chemo- and regioselective method has been developed for the halogenation of phenols using Cu-Mn spinel oxide as a catalyst and N-halosuccinimide as halogenating agent. In the presence of Cu-Mn spinel oxide B, both electron-withdrawing and electron-donating groups bearing phenols gave monohalogenated products in good to excellent yields with highest para-selectivity. The para-substituted phenol gave monohalogenated product with good yield and ortho-selectivity. N-Heteroarenes such as indoles and imidazoles also gave monohalogenated products with high selectivity. Unlike the copper-catalyzed halogenation, the present method works well with electron-withdrawing group bearing phenols and gives comparatively better yields and selectivity. The Cu-Mn spinel catalyst is robust and reused three times under optimized conditions without any loss in catalytic activity. Nonphenolics did not undergo this transformation.