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【结 构 式】

【药物名称】

【化学名称】(-)-2,6-Dimethyl-5-nitro-4(S)-[2-(trifluoromethyl)phenyl]-1,4-dihydropyridine-3-carboxylic acid 2-(nitrooxy)ethyl ester

【CA登记号】250330-33-7, 250330-34-8 (enantiomer), 339528-66-4 (undefined stereochem.)

【 分 子 式 】C17H16F3N3O7

【 分 子 量 】431.32817

【开发单位】Dalhousie University (Originator), University of Alberta (Originator)

【药理作用】CARDIOVASCULAR DRUGS, Heart Failure Therapy, Calcium Channel Activators, Calcium Channel Blockers

合成路线1

D-Threonine (I) was esterified by means of thionyl chloride in methanol, and the resultant amino ester (II) was subsequently acylated with 3,5-dinitrobenzoyl chloride (III) to afford amide (IV). Conversion of (IV) to the acetoacetate ester (VI) was effected by reaction with the diketene precursor 2,2,6-trimethyl-4H-1,3-dioxin-4-one (V) in boiling xylene. Treatment of keto ester (V) with ammonia in the presence of p-toluenesulfonic acid produced the aminocrotonate ester (VI). Dihydropyridine (IXa-b) was then obtained as a diastereomeric mixture by a modified Hantzsh condensation between enamine (VI), 2-trifluoromethylbenzaldehyde (VII) and nitroacetone. After chromatographic separation of the isomers, the chiral auxiliary group was removed by methanolysis in the presence of DBU. The desired (+)-(S)-dihydropyridinecarboxylic acid (X) was finally converted to the nitrooxyethyl ester by reaction with 2-bromoethyl nitrate (XI).

1 Shan, R.; Knaus, E.E.; Howlett, S.E.; Syntheses, calcium channel agonist-antagonist modulation activities, nitric oxide release, and voltage-clamp studies of 2-nitrooxyethyl 1,4-dihydro-2,6-dimethyl-3-nitro-4-(2-trifluoromethylphenyl)pyridine-5-carboxylate enantiomers. J Med Chem 2002, 45, 4, 955.
2 Knaus, E.E.; Shan, R.; The design of (-)-(S)-nitrooxyethyl 1,4-dihydro-2,6-dimethyl-3-nitro-4-(2-trifluoromethylphenyl)pyridine-5-carboxylate: A cardioselective positive inotropic derivative of Bay K 8644. Bioorg Med Chem Lett 1999, 9, 17, 2613.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VIIII) 30332 2-(trifluoromethyl)benzaldehyde 447-61-0 C8H5F3O 详情 详情
(IXa) 59607 (1S,2R)-2-[(3,5-dinitrobenzoyl)amino]-3-methoxy-1-methyl-3-oxopropyl (4S)-2,6-dimethyl-5-nitro-4-[2-(trifluoromethyl)phenyl]-1,4-dihydro-3-pyridinecarboxylate C27H24F3N5O11 详情 详情
(IXb) 59608 (1S,2R)-2-[(3,5-dinitrobenzoyl)amino]-3-methoxy-1-methyl-3-oxopropyl (4R)-2,6-dimethyl-5-nitro-4-[2-(trifluoromethyl)phenyl]-1,4-dihydro-3-pyridinecarboxylate C27H24F3N5O11 详情 详情
(I) 28908 L-Threonine; (2R,3S)-2-amino-3-hydroxybutyric acid 632-20-2 C4H9NO3 详情 详情
(II) 42026 methyl (2S,3R)-2-amino-3-hydroxybutanoate C5H11NO3 详情 详情
(III) 12053 3,5-Dinitrobenzoyl chloride 99-33-2 C7H3ClN2O5 详情 详情
(IV) 59604 methyl (2R,3S)-2-[(3,5-dinitrobenzoyl)amino]-3-hydroxybutanoate C12H13N3O8 详情 详情
(V) 13327 2,2,6-Trimethyl-4H-1,3-dioxin-4-one;2,2,6-trimethyl-1,3-dioxin-4-one;2,2,6-trimethyl-m-Dioxin-4-one;3-(1-hydroxy-1-methylethoxy)-d-lactone Crotonicacid 5394-63-8 C7H10O3 详情 详情
(VI) 59605 methyl (2R,3S)-3-(acetoacetyloxy)-2-[(3,5-dinitrobenzoyl)amino]butanoate C16H17N3O10 详情 详情
(VII) 59606 (1S,2R)-2-[(3,5-dinitrobenzoyl)amino]-3-methoxy-1-methyl-3-oxopropyl (E)-3-amino-2-butenoate C16H18N4O9 详情 详情
(X) 59609 (4S)-2,6-dimethyl-5-nitro-4-[2-(trifluoromethyl)phenyl]-1,4-dihydro-3-pyridinecarboxylic acid C15H13F3N2O4 详情 详情
(XI) 59610 1-bromo-2-(nitrooxy)ethane C2H4BrNO3 详情 详情
Extended Information