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【结 构 式】

【分子编号】57865

【品名】(3R)-3-amino-1-(benzyloxy)-2,6-piperidinedione

【CA登记号】

【 分 子 式 】C12H14N2O3

【 分 子 量 】234.25484

【元素组成】C 61.53% H 6.02% N 11.96% O 20.49%

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:(VI)

The esterification of N-(tert-butoxycarbonyl)-D-glutamic acid 5-O-benzyl ester (I) with phenol by means of DCC and pyridine in ethyl acetate gives the mixed ester (II), which is treated with H2 over Pd/C in methanol to yield the N-(tert-butoxycarbonyl)-D-glutamic acid 1-O-phenyl ester (III). The cyclization of (III) with O-benzylhydroxylamine (IV) by means of EDC, HOBT and TEA in dichloromethane affords N-[1-(benzyloxy)-2,6-dioxopiperidin-3(R)-yl]carbamic acid tert-butyl ester (V), which is treated with HCl gas in dichloromethane to provide 3(R)-amino-1-(benzyloxy)piperidine-2,6-dione (VI). The reaction of (VI) with phthalic anhydride (VII) by means of TEA in THF gives the phthalimido derivative (VIII), which is debenzylated with H2 over Pd/C in methanol to yield 1-hydroxy-3-(R)-(phthalimido)piperidine-2,6-dione (IX). Finally, the OH group of (IX) is eliminated by reaction with phenacyl bromide (X) and TEA in acetonitrile to afford the phenacyl ether (XI), which is submitted to a nucleophilic cleavage by means of DMAP as the base to obtain the target (R)-thalidomide.

1 Robin, S.; et al.; A convenient asymmetric synthesis of thalidomide. Tetrahedron Asymmetry 1995, 6, 6, 1249.
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) 57869 (2R)-5-(benzyloxy)-2-[(tert-butoxycarbonyl)amino]-5-oxopentanoic acid C17H23NO6 详情 详情
(II) 57862 5-benzyl 1-phenyl (2R)-2-[(tert-butoxycarbonyl)amino]pentanedioate C23H27NO6 详情 详情
(III) 57863 (4R)-4-[(tert-butoxycarbonyl)amino]-5-oxo-5-phenoxypentanoic acid C16H21NO6 详情 详情
(IV) 14640 O-benzylhydroxylamine; 1-[(aminooxy)methyl]benzene 622-33-3 C7H9NO 详情 详情
(V) 57864 tert-butyl (3R)-1-(benzyloxy)-2,6-dioxopiperidinylcarbamate C17H22N2O5 详情 详情
(VI) 57865 (3R)-3-amino-1-(benzyloxy)-2,6-piperidinedione C12H14N2O3 详情 详情
(VII) 11900 2-Benzofuran-1,3-dione;1,2-Benzenedicarboxylic Anhydride;1,2-BENZENE DICARBOXYLIC ACID ANHYDRIDE;1,2-BENZENEDICARBONIC ACID, ANHYDRIDE;1,3-DIOXOPHTHALAN;1,3-ISOBENZOFURANDIONE;o-phthalic anhydride; Phthalic anhydride 85-44-9 C8H4O3 详情 详情
(VIII) 57866 2-[(3R)-1-(benzyloxy)-2,6-dioxopiperidinyl]-1H-isoindole-1,3(2H)-dione C20H16N2O5 详情 详情
(IX) 57867 2-[(3R)-1-hydroxy-2,6-dioxopiperidinyl]-1H-isoindole-1,3(2H)-dione C13H10N2O5 详情 详情
(X) 10315 2-Bromo-1-phenyl-ethanone; 2-Bromo-1-phenyl-1-ethanone 70-11-1 C8H7BrO 详情 详情
(XI) 57868 2-[(3R)-2,6-dioxo-1-(2-oxo-2-phenylethoxy)piperidinyl]-1H-isoindole-1,3(2H)-dione C21H16N2O6 详情 详情
Extended Information