1658-73-7Relevant articles and documents
Syntheses and evaluation of daphnetin derivatives as novel G protein-coupled receptor inhibitors and activators
Wang, Yinan,Wang, Jiangming,Fu, Zhe,Sheng, Ruilong,Wu, Wenhui,Fan, Junting,Guo, Ruihua
, (2020)
A series of daphnetin (7,8-dihydroxycoumarin) derivatives 1–22 were synthesized including sixteen new compounds (1–5, 7–14, 18, 21 and 22) and six known compounds (6, 15–17, 19 and 20). Their pharmacological activities on G protein-coupled receptors (GPCRs) were evaluated by double antibody sandwich ELISA (DAS-ELISA) in vitro. Daphnetin derivatives with various substitution patterns/groups were obtained from inhibitors to activators on GPCRs. Derivatives 2–5, 8, 15, 16 and 18–20 possessed moderate activation potency on GPCRs. Among them, derivatives 3–5, 16 and 19 presented significant activation potency on GPCRs with EC50 values in the range of 1.18–1.91 nM. Derivatives 6, 11, 14 and 18 showed significant inhibitory potency on GPCRs with IC50 values in the range of 1.26–1.38 nM. Moreover, the structure-activity relationships (SARs) of daphnetin derivatives were discussed in detail. The new daphnetic-based GPCRs activators and inhibitors have potentials as future drug candidates for the treatment of metabolic diseases.
Introduction of poly(4-vinylpyridinium) perchlorate as a new, efficient, and versatile solid acid catalyst for one-pot synthesis of substituted coumarins under ultrasonic irradiation
Khaligh, Nader Ghaffari,Shirini, Farhad
, p. 26 - 31,6 (2012/12/11)
Poly(4-vinylpyridinium) perchlorate, is a supported, recyclable, eco-benign catalyst for synthesis of substituted coumarins via Pechmann reaction using ultrasound irradiation at room temperature and neat condition in high yields with short reaction times. The catalyst was studied by FT-IR, X-ray diffraction, scanning electron microscope, thermo-gravimetric and energy dispersion X-ray analyses. All the products were extensively characterized by 1H NMR, FT-IR, MS and melting point analyses. This methodology offers momentous improvements over various options for the synthesis of coumarins with regard to yield of products, simplicity in operation and green aspects by avoiding toxic catalysts and solvents. Further, the catalyst can be reused and recovered for several times without loss of activity.
Succinimide-N-sulfonic acid catalyzed synthesis of bis(indolyl)methane and coumarin derivatives under mild conditions
Shirini, Farhad,Khaligh, Nader Ghaffari
, p. 1890 - 1896 (2013/11/19)
A mild and simple procedure is described for the synthesis of bis(indolyl)methane and coumarin derivatives using succinimide-N-sulfonic acid as an efficient, cheap, and reusable catalyst under mild conditions.
