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【结 构 式】

【分子编号】17554

【品名】isobutyl 2-[3-(4-cyanophenyl)-4,5-dihydro-5-isoxazolyl]acetate

【CA登记号】

【 分 子 式 】C16H18N2O3

【 分 子 量 】286.3306

【元素组成】C 67.12% H 6.34% N 9.78% O 16.76%

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:(III)

Reaction of 4-cyanobenzaldehyde (I) with hydroxylamine sulfate in methanol gives 4-cyanobenzaldoxime (II). A 1,3-dipolar cycloaddition of (II) with isobutyl vinylacetate using N-chlorosuccinimide provides the racemic isoxazoline derivative (III). Treatment of (III) with lipase PS30 selectively converts the (R)-isomer to an optically pure acid (IV). Coupling of (IV) with methyl N2-(n-butyloxycarbonyl)-L-2,3-diaminopropionate (VI), which is derived from its corresponding commerically available acid (V), gives the intermediate (VII). Treatment of (VII) with HCl in methanol and ethyl acetate followed by ammonium acetate affords DMP 754 as a crystalline product. Saponification of DMP 754 using LiOH provides the corresponding acid (VIII).

1 Anzalone, L.; Storace, L. Ward, R.; Kauffman, G.S.; Zhang, L.-H.; Ma, P.; The chiral specific synthesis of DMP 754, a platelet GPIIb/IIIa antagonist. Tetrahedron Lett 1996, 37, 26, 4455-8.
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) 17552 4-formylbenzonitrile; 4-Cyanobenzaldehyde 105-07-7 C8H5NO 详情 详情
(II) 17553 4-[(hydroxyimino)methyl]benzonitrile C8H6N2O 详情 详情
(III) 17554 isobutyl 2-[3-(4-cyanophenyl)-4,5-dihydro-5-isoxazolyl]acetate C16H18N2O3 详情 详情
(IV) 17555 2-[(5R)-3-(4-cyanophenyl)-4,5-dihydro-5-isoxazolyl]acetic acid C12H10N2O3 详情 详情
(V) 17556 (2S)-3-amino-2-[(butoxycarbonyl)amino]propionic acid C8H16N2O4 详情 详情
(VI) 17557 methyl (2S)-3-amino-2-[(butoxycarbonyl)amino]propanoate hydrochloride C9H19ClN2O4 详情 详情
(VII) 17558 methyl (2S)-2-[(butoxycarbonyl)amino]-3-([2-[(5R)-3-(4-cyanophenyl)-4,5-dihydro-5-isoxazolyl]acetyl]amino)propanoate C21H26N4O6 详情 详情
(VIII) 17559 (2S)-3-[[2-((5R)-3-[4-[amino(imino)methyl]phenyl]-4,5-dihydro-5-isoxazolyl)acetyl]amino]-2-[(butoxycarbonyl)amino]propionic acid C20H27N5O6 详情 详情
Extended Information