Organic Nitrates II[1]. Synthesis and Biological Activities of 4-Nitrooxymethylphenyl-1,4-dihydropyridines
作者:Jochen Lehmann、Rainer Kahlich、Christoph Meyer Zum Gottesberge、Uwe Fricke
DOI:10.1002/ardp.19973300804
日期:——
Both 2‐nitrooxymethyl‐4‐phenyl‐ (2) and 4‐nitrooxymethylphenyl‐1,4‐dihydropyridines (3) represent new combinations of two different vasodilating structures. 2 could not be isolated due to its spontaneous lactonization. Derivatives of 3 were obtained via Hantzsch synthesis using nitrooxymethylated benzaldehydes. The inotropic potency in isolated porcine trabecular muscles and the vasodilator activity
NO donors, part 8 []: synthesis and vasodilating activities of substituted benzylnitrates compared to cyclohexylmethylnitrate and GTN
作者:C Weßler
DOI:10.1016/s0223-5234(03)00079-5
日期:2003.6
A series of substituted benzylnitrates (1) and the formally but not chemically similar cyclohexylmethylnitrate (CHMN) have been synthesised. Vasodilating activities were measured on endothelium-intact and N-G-nitro-(L)-arginine ((L)-NNA)-blocked porcine right coronary arteries, precontracted with prostaglandin F-2alpha (PGF(2alpha)). Glyceroltrinitrate (GTN) was used as reference. In intact coronary arteries the vasodilating activities of all benzylnitrates are lower compared with GTN, but higher compared with CHMN. However, blocking the function of the endothelium by L-NNA, the activity of all benzy1nitrates increased, whereas that of CHMN and GTN remained nearly unaffected. Under these conditions, the mononitrates 4-nitro-benzylnitrate (1c) and 4-nitrooxymethyl-benzonitrile (1h) even showed higher vasodilator activities than the trinitrate GTN and in general, vasorelaxation by the benzy1nitrates as defined by the concentrations for half maximal effects (EC50 values) was found to be 2-3 orders of magnitude higher than that induced by CHMN. The study demonstrates that the in vitro activities of organic nitrates do not correlate with the number of nitrate groups within the molecule nor to the lipophilicity of the molecules. Instead, vasodilator activity is highly sensitive to the structure and the type of the substituents in the molecular carrier of the nitrate group. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
Synthesis of Benzylic Alcohols by Decarboxylative Hydroxylation
作者:Qian Yu、Donglin Zhou、Yaoyue Liu、Xuejin Huang、Chunlan Song、Junjun Ma、Jiakun Li
DOI:10.1021/acs.orglett.2c03741
日期:2023.1.13
demonstrate an efficient method for the decarboxylative hydroxylation of carboxylicacids with silver(I) as the catalyst and ceriumammoniumnitrate as the oxidant and its utility in chemoselective late-stage functionalization of natural products and drug molecules. The chemoselectivity of this protocol arises from a benzylic nitrate intermediate that retards further oxidation and is hydrolyzed to the