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【结 构 式】

【药物名称】

【化学名称】 

【CA登记号】

【 分 子 式 】C17H17N3O2

【 分 子 量 】295.34394

【开发单位】

【药理作用】 

合成路线1

The asymmetric 1,3-dipolar cycloaddition of the nitrile oxide resulting from 4-bromo-N-hydroxybenzenecarboximidoyl chloride (I) to allyl alcohol (II) in the presence of (R,R)-diisopropyl tartrate and diethylzinc afforded the (R)-5-(hydroxymethyl)isoxazoline (III). Treatment of 4-bromopyridine (IV) with hexamethylditin and dichlorobis(triphenylphosphine)palladium yielded 4-trimethylstannylpyridine (V). Subsequent coupling of bromophenylisoxazoline (III) with stannylpyridine (V) in the presence of tris(dibenzylideneacetone)-dipalladium and tri(2-furyl)phosphine gave rise to the pyridylphenylisoxazole (VI). After conversion of (VI) to the mesylate (VII), treatment with ammonium hydroxide in a sealed vessel provided primary amine (VIII). Finally, acetylation of (VIII) with Ac2O and pyridine furnished the title amide.

1 Ukaji, Y.; et al.; Enantioselective synthesis of 2-isoxazolines via asymmetric 1,3-dipolar cycloaddition of nitrile oxides to achiral allyl alcohols. Chem Lett 1993, 11, 1847.
2 Barbachyn, M.R.; Thomas, R.C.; Cleek, G.J. (Pharmacia & Upjohn AB); Isoxazoline derivs. useful as antimicrobials. EP 0920421; US 5990136; WO 9807708 .
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) 32966 4-bromo-N-hydroxybenzenecarboximidoyl chloride C7H5BrClNO 详情 详情
(II) 12234 2-Propen-1-ol; Allyl alcohol 107-18-6 C3H6O 详情 详情
(III) 32967 [(5R)-3-(4-bromophenyl)-4,5-dihydro-5-isoxazolyl]methanol C10H10BrNO2 详情 详情
(IV) 23565 4-bromopyridine 1120-87-2 C5H4BrN 详情 详情
(V) 32976 4-(trimethylstannyl)pyridine C8H13NSn 详情 详情
(VI) 32977 [(5R)-3-[4-(4-pyridinyl)phenyl]-4,5-dihydro-5-isoxazolyl]methanol C15H14N2O2 详情 详情
(VII) 32978 [(5R)-3-[4-(4-pyridinyl)phenyl]-4,5-dihydro-5-isoxazolyl]methyl methanesulfonate C16H16N2O4S 详情 详情
(VIII) 32979 [(5R)-3-[4-(4-pyridinyl)phenyl]-4,5-dihydro-5-isoxazolyl]methanamine; [(5R)-3-[4-(4-pyridinyl)phenyl]-4,5-dihydro-5-isoxazolyl]methylamine C15H15N3O 详情 详情
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