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【结 构 式】

【分子编号】42169

【品名】(2S)-2-amino-4-[[(3S)-3-amino-3-carboxypropyl]disulfanyl]butyric acid

【CA登记号】

【 分 子 式 】C8H16N2O4S2

【 分 子 量 】268.35812

【元素组成】C 35.81% H 6.01% N 10.44% O 23.85% S 23.9%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(X)

The reaction of tetrahydrofuran (I) with HBr gives 4-bromobutanol (II), which is oxidized with NaOCl and TEMPO to yield the aldehyde (III). The reaction of (III) with ethyleneglycol and Ts-OH provides the cyclic ketal (IV), which is submitted to a Grignard condensation with diethyl oxalate (V) and Mg to give the alpha-ketoester (VI). The hydrolysis of (VI) with LiOH yields the corresponding alpha-ketoacid (VII), which is submitted to a stereoselective amination with ammonia and phenylalanine dehydrogenase to afford 2(S)-amino-5-(1,3-dioxol-2-yl)pentanoic acid (VIII). The reaction of (VIII) with SOCl2 and Me-OH provides 2(S)-amino-5,5-dimethoxypentanoic acid methyl ester (IX). The reaction of L- homocystine (X) with Boc2O gives the N-protected-L-homocystine (XI), which is condensed with pentanoic ester (IX) to yield the dimeric adduct (XII). The cleavage of (XII) with dithiothreitol (DTT) affords the monomeric intermediate (XIII), which is finally cyclized by means of Ms-OH to provide the target pyrido[2,1-b][1,3]thiazepine intermediate (XIV).

1 Patel, R.N.; Enzymatic synthesis of chiral intermediates for omapatrilat, an antihypertensive drug. Biomol Eng 2001, 17, 6, 167.
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) 41419 tetrahydrofuran 109-99-9 C4H8O 详情 详情
(II) 50608 Tetramethylene Bromohydrin; 4-Bromo-1-butanol;4-bromobutan-1-ol 33036-62-3 C4H9BrO 详情 详情
(III) 50609 4-bromobutanal C4H7BrO 详情 详情
(IV) 50610 2-(3-bromopropyl)-1,3-dioxolane C6H11BrO2 详情 详情
(V) 17571 Diethyl oxalate; Ethyl 2-ethoxy-2-oxoacetate 95-92-1 C6H10O4 详情 详情
(VI) 50611 ethyl 5-(1,3-dioxolan-2-yl)-2-oxopentanoate C10H16O5 详情 详情
(VII) 50612 5-(1,3-dioxolan-2-yl)-2-oxopentanoic acid C8H12O5 详情 详情
(VIII) 50613 (2S)-2-amino-5-(1,3-dioxolan-2-yl)pentanoic acid C8H15NO4 详情 详情
(IX) 22504 methyl (2S)-2-amino-6,6-dimethoxyhexanoate C9H19NO4 详情 详情
(X) 42169 (2S)-2-amino-4-[[(3S)-3-amino-3-carboxypropyl]disulfanyl]butyric acid C8H16N2O4S2 详情 详情
(XI) 50614 (2S)-2-[[(benzyloxy)carbonyl]amino]-4-[((3S)-3-[[(benzyloxy)carbonyl]amino]-3-carboxypropyl)disulfanyl]butyric acid C24H28N2O8S2 详情 详情
(XII) 50615 dimethyl (7S,10S,17S,20S)-10,17-bis[[(benzyloxy)carbonyl]amino]-3,24-dimethoxy-9,18-dioxo-2,25-dioxa-13,14-dithia-8,19-diazahexacosane-7,20-dicarboxylate C42H62N4O14S2 详情 详情
(XIII) 50616 methyl (2S)-2-[((2S)-2-[[(benzyloxy)carbonyl]amino]-4-sulfanylbutanoyl)amino]-6,6-dimethoxyhexanoate C21H32N2O7S 详情 详情
(XIV) 50617 (4S,7S,10aS)-4-[[(benzyloxy)carbonyl]amino]-5-oxooctahydro-7H-pyrido[2,1-b][1,3]thiazepine-7-carboxylic acid C18H22N2O5S 详情 详情

合成路线2

该中间体在本合成路线中的序号:(I)

Reductive cleavage of L-homocystine (I) with sodium in liquid ammonia produced homocysteine, which was subsequently alkylated with 2-(N-benzyloxycarbonyl-amino)ethyl tosylate (II) to afford thioether (III). The benzyloxycarbonyl protecting group of (III) was cleaved with HBr to give diamine (IV). Finally, condensation with ethyl acetimidate (V) furnished the target amidine.

1 Young, R.J.; et al.; Inhibition of inducible nitric oxide synthase by acetamidine derivatives of hetero-substituted lysine and homolysine. Bioorg Med Chem Lett 2000, 10, 6, 597.
2 Beams, R.M.; Frend, A.J.; Drysdale, M.J.; Franzman, K.W.; Hodson, H.F.; Rees, D.D.; Knowles, R.G.; Sawyer, D.A. (Glaxo Wellcome plc); Nitric oxide synthase inhibitors. EP 0958277; JP 2000504041; WO 9830537 .
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) 42169 (2S)-2-amino-4-[[(3S)-3-amino-3-carboxypropyl]disulfanyl]butyric acid C8H16N2O4S2 详情 详情
(II) 42170 2-[[(benzyloxy)carbonyl]amino]ethyl 4-methylbenzenesulfonate C17H19NO5S 详情 详情
(III) 42171 (2S)-2-amino-4-[(2-[[(benzyloxy)carbonyl]amino]ethyl)sulfanyl]butyric acid C14H20N2O4S 详情 详情
(IV) 42172 (2S)-2-amino-4-[(2-aminoethyl)sulfanyl]butyric acid C6H14N2O2S 详情 详情
(V) 12831 ethyl ethanimidoate 1000-84-6 C4H9NO 详情 详情
Extended Information