NAD analogs. 1. Synthesis of isosteric analogs of nicotinamide adenine dinucleotide containing C-nucleotide of nicotinamide or picolinamide
摘要:
Two isosteric analogues of nicotinamide adenine dinucleotide, C-NAD (11) and C-PAD (12), in which the nicotinamide riboside portion is replaced by a C-nucleoside, were synthesized from 5-(beta-D-ribofuranosyl)nicotinamide (7) and 6-(beta-D-ribofuranosyl)picolinamide (8), respectively. Nucleoside 7 was prepared from the 2,3-O-isopropylidene-5-O-(tetrahydropyranyl)-D-ribonolactone (13) and 3-cyano-5-lithiopyridine as reported earlier. Nucleoside 8 was obtained by conversion of the bromo function of the 6-(2,3:4,5-di-O-isopropylidene-D-altro-pentitol-1-yl)-2-bromopyridine (14) into a carboxamido group followed by mesylation of the anomeric hydroxyl group to give derivative 18. Treatment of 18 with CF3COOH/CHCl3 caused deisopropylidenation with simultaneous cyclization into the desired 6-(beta-D-ribofuranosyl)picolinamide (8). NAD analogues, C-NAD (11) and C-PAD (12), were synthesized by imidazole-catalyzed coupling of the corresponding 5'-monophosphates of 7 and 8 with the adenosine-5'-monophosphate. Dinucleotide 11 was found to inhibit the proliferation of L1210 cells (IC50 = 7 muM) and to be a good competitive inhibitor of inosine monophosphate dehydrogenase (IMPDH, ID50 = 20 muM) as well as bovine glutamate dehydrogenase (GDH, K(i) = 15 muM). Interestingly, C-NAD (11) caused extremely potent noncompetitive inhibition of horse liver alcohol dehydrogenase (ADH, K(i) = 1.1 nM), whereas C-PAD (12) was found to be a much less potent competitive inhibitor (K(i) = 20 muM) of ADH.
Nucleosides. 141. Synthesis of 5-.beta.-D-ribofuranosylnicotinamide and its N-methyl derivative. The isosteric and isoelectronic analogs of nicotinamide nucleoside
摘要:
The pyridine C-nucleosides 5-beta-D-ribofuranosylnicotinamide and its N-methylpyridinium derivative (1 and 2), which are isosteric and isoelectronic, respectively, to nicotinamide nucleoside were synthesized. Condensation of 3-bromo-5-lithiopyridine with 2,4:3,5-di-O-benzylidene-D-aldehydoribose (7) afforded an allo/altro mixture of the corresponding bromopyridine derivatives, which were converted into nicotinamide C-nucleoside precursors 10. Mesylation of the hydroxyl group of 10 followed by acid hydrolysis of the product afforded the anomeric nicotinamide C-nucleosides. The beta anomer 1 was separated and treated with MeI to give 2.
Described herein are methods of inhibiting angiogenesis, and treating or preventing a disease or disorder (or symptoms thereof) associated with angiogenesis, wherein an anti-angiogenesis compound is administered to a subject.
申请人:DUKE UNIVERSITY Office of Science and Technology
公开号:US20020128205A1
公开(公告)日:2002-09-12
Patients needing NO donor therapy or inhibition of pathologically proliferating cells or increased NO bioactivity are treated with a therapeutically effective amount of an inhibitor of glutathione-dependent formaldehyde dehydrogenase.
需要 NO 供体治疗或抑制病理增殖细胞或增加 NO 生物活性的患者,可使用治疗有效量的谷胱甘肽依赖性甲醛脱氢酶抑制剂。
Antiviral agents for treatment of Flaviviridae infections
申请人:——
公开号:US20040266723A1
公开(公告)日:2004-12-30
The disclosed invention is a composition for and a method of treating
Flaviviridae
(
Hepacivirus, Flavivirus, Pestivirus
) infections, including BVDV and HCV, in a host, including animals, and especially humans, using a small molecule or its pharmaceutically acceptable salt or prodrug.