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【结 构 式】

【分子编号】18281

【品名】4-[(E)-7-methoxy-7-oxo-1-(3-pyridinyl)-1-heptenyl]benzoic acid

【CA登记号】

【 分 子 式 】C20H21NO4

【 分 子 量 】339.39108

【元素组成】C 70.78% H 6.24% N 4.13% O 18.86%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(X)

1,4-Benzenedimethanol (I) was monoprotected with tert-butyldimethylsilyl chloride in the presence of imidazole, and the resulting silyl ether (II) was oxidized with MnO2 in refluxing THF to aldehyde (III). This was treated with 3-lithiopyridine (IV), (generated from 3-bromopyridine and butyllithium at -78 C in Et2O), to give carbinol (V), which was oxidized with MnO2 to ketone (VI). Wittig reaction with 5-carboxypentylphosphonium bromide (VII) and t-BuOK in THF at low temperature yielded a 4:1 mixture of Z and E heptenoic acids (VIII). Subsequent reaction with diazomethane provided a mixture of esters, from which the E isomer (IX) was separated by column chromatography. Oxidation of TBDMS ether with Jones reagent provided acid (X), and this was coupled with N-(4-cyclohexylbutyl)-L-serinamide (XI) using N-(dimethylaminopropyl)-N'-ethylcarbodiimide.HCl (EDC) in the presence of HOBT and N-methylmorpholine to give amide (XII). Cyclization to oxazolidine (XIII) was effected by treatment with triphenyl phosphine and diisopropylethylamine.

1 Takeuchi, K.; Kohn, T.J.; Mais, D.E.; True, T.A.; Wyss, V.L.; Jakubowski, J.A.; Development of dual-acting agents for thromboxane receptor antagonism and thromboxane synthase inhibition. 2. Design, synthesis, and evaluation of a novel series of phenyl oxazole derivatives. Bioorg Med Chem Lett 1998, 8, 15, 1943-1948.
2 Takeuchi, K.; Kohn, T.J.; True, T.A.; Mais, D.E.; Wikel, J.H.; Utterback, B.G.; Wyss, V.L.; Jakubowski, J.A.; Development of dual-acting agents for thromboxane receptor antagonism and thromboxane synthase inhibition. 3. Synthesis and biological activities of oxazolecarboxamide-substituted omega-phenyl-omega-(3-pyridyl)alkenoic acid derivatives and related compo. J Med Chem 1998, 41, 27, 5362.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 18272 [4-(hydroxymethyl)phenyl]methanol; p-Xylylene Glycol 589-29-7 C8H10O2 详情 详情
(II) 18273 [4-([[tert-butyl(dimethyl)silyl]oxy]methyl)phenyl]methanol C14H24O2Si 详情 详情
(III) 18274 4-([[tert-butyl(dimethyl)silyl]oxy]methyl)benzaldehyde C14H22O2Si 详情 详情
(V) 18276 [4-([[tert-butyl(dimethyl)silyl]oxy]methyl)phenyl](3-pyridinyl)methanol C19H27NO2Si 详情 详情
(VI) 18277 [4-([[tert-butyl(dimethyl)silyl]oxy]methyl)phenyl](3-pyridinyl)methanone C19H25NO2Si 详情 详情
(VIII) 18279 (E)-7-[4-([[tert-butyl(dimethyl)silyl]oxy]methyl)phenyl]-7-(3-pyridinyl)-6-heptenoic acid C25H35NO3Si 详情 详情
(IX) 18280 methyl (E)-7-[4-([[tert-butyl(dimethyl)silyl]oxy]methyl)phenyl]-7-(3-pyridinyl)-6-heptenoate C26H37NO3Si 详情 详情
(X) 18281 4-[(E)-7-methoxy-7-oxo-1-(3-pyridinyl)-1-heptenyl]benzoic acid C20H21NO4 详情 详情
(XII) 18283 methyl (E)-7-[4-([[(1S)-2-[(4-cyclohexylbutyl)amino]-1-(hydroxymethyl)-2-oxoethyl]amino]carbonyl)phenyl]-7-(3-pyridinyl)-6-heptenoate C33H45N3O5 详情 详情
(XIII) 18284 methyl (E)-7-[4-((4S)-4-[[(4-cyclohexylbutyl)amino]carbonyl]-4,5-dihydro-1,3-oxazol-2-yl)phenyl]-7-(3-pyridinyl)-6-heptenoate C33H43N3O4 详情 详情
Extended Information