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【结 构 式】

【分子编号】68745

【品名】ethyl ((1R,3aR,6S,8aR,9S,9aS)-9-(diphenylcarbamoyl)-1-methyl-3-oxo-1,3,3a,5,6,7,8,8a,9,9a-decahydronaphtho[2,3-c]furan-6-yl)carbamate

【CA登记号】 

【 分 子 式 】C29H32N2O5

【 分 子 量 】488.58356

【元素组成】C 71.29% H 6.6% N 5.73% O 16.37%

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:(XLIV)

Hydrolysis of (5,5-ethylenedioxy-1-cyclohexenyl)acrylic acid (XVI) with p-TsOH followed by reductive amination with NH4OAc and NaBH3CN and N-acylation of the obtained amine with ethyl chloroformate (VIII) gives carbamate (XLI) as a racemic mixture, which is resolved by means of chiral HPLC, providing the (R)-enantiomer (XLII). Esterification of acid (XLII) with allylic alcohol (XXXII) in the presence of EDC and DMAP in CH2Cl2 yields the corresponding ester (XLIII), which by intramolecular Diels–Alder cyclization in xylene at 147 °C followed by epimerization in the presence of DBU furnishes the tricyclic intermediate (XLIV). Catalytic hydrogenation of alkene (XLIV) over Pt/C affords the saturated compound (XLV) , which is finally hydrolyzed with NaOH . Alternatively, condensation of nitro acid (XXXVII) with the hydroxypentynamide (XXX) by means of pivaloyl chloride, NMP and DMAP yields ester (XLVI), which is submitted to partial hydrogenation over Lindlar catalyst poisoned with quinoline to afford triene (XLVII). Thermal Diels–Alder cyclization of compound (XLVII) followed by epimerization in the presence of DBU provides the tricyclic carbamide (XLVIII). Simultaneous nitro group and olefin reduction in compound (XLVIII) by means of H2 and Pt/C or by transfer hydrogenation with HCOOH and Pd/C leads to the tricyclic amine (XLIX), which is finally acylated with ethyl chloroformate (VIII) to afford the corresponding carbamate (XLV) .
Other synthetic approaches to intermediate (X) include alkaline cleavage of benzothiazolyl ketone (L) (4) and hydrogenation/debenzylation of the unsaturated precursor (LI) over Pt/C .

1 Sudhakar, A., Kwok, D.-I., Wu, G.G., Green, M.D., Thiruvengadam, T.K., Lim, N.K., Wang, T., Huang, M. (Schering Corp.). An exo-selective synthesis of himbacine analogs. EP 1846385, JP 2008526974, US 2006217422, US 7772276, WO 2006076452.
2 Wu, G., Sudhakar, A.R., Wang, T. et al. (Schering Corp.). Exo- and diastereo- selective synthesis of himbacine analogs. CA 2594871, EP 1848705, EP 2196454, EP 2196468, EP 2206697, JP 2008526972, US 2006247450, WO 2006076415.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VIII) 11229 1-[(Chlorocarbonyl)oxy]ethane;ethyl carbonochloridate; Carbonchloridic acid ethyl ester;Ethyl chloroformate;Ethyl chlorocarbonate 541-41-3 C3H5ClO2 详情 详情
(X) 68707 (3S,3aS,4R,4aS,7S,8aS,9aS)-7-((ethoxycarbonyl)amino)-3-methyl-1-oxododecahydronaphtho[2,3-c]furan-4-carboxylic acid   C17H25NO6 详情 详情
(XVI) 68716 (E)-3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acrylic acid   C11H14O4 详情 详情
(XXXII) 68728 (R,E)-4-hydroxy-N,N-diphenylpent-2-enamide;4(R)-hydroxy-N,Ndiphenyl-2-pentenamide   C17H17NO2 详情 详情
(XLI) 68737 (E)-3-(5-((ethoxycarbonyl)amino)cyclohex-1-en-1-yl)acrylic acid   C12H17NO4 详情 详情
(XLII) 68738 (R,E)-3-(5-((ethoxycarbonyl)amino)cyclohex-1-en-1-yl)acrylic acid   C12H17NO4 详情 详情
(XLIII) 68739 (E)-(R,Z)-5-(diphenylamino)-5-oxopent-3-en-2-yl 3-((R)-5-((ethoxycarbonyl)amino)cyclohex-1-en-1-yl)acrylate   C29H32N2O5 详情 详情
(XLIV) 68745 ethyl ((1R,3aR,6S,8aR,9S,9aS)-9-(diphenylcarbamoyl)-1-methyl-3-oxo-1,3,3a,5,6,7,8,8a,9,9a-decahydronaphtho[2,3-c]furan-6-yl)carbamate   C29H32N2O5 详情 详情
(XLV) 68744 ethyl ((1R,3aR,4aR,6S,8aS,9S,9aS)-9-(diphenylcarbamoyl)-1-methyl-3-oxododecahydronaphtho[2,3-c]furan-6-yl)carbamate   C29H34N2O5 详情 详情
(XLVI) 68740 (E)-(R)-5-(diphenylamino)-5-oxopent-3-yn-2-yl 3-(5-nitrocyclohex-1-en-1-yl)acrylate   C26H24N2O5 详情 详情
(XLVII) 68741 (E)-(R,Z)-5-(diphenylamino)-5-oxopent-3-en-2-yl 3-(5-nitrocyclohex-1-en-1-yl)acrylate   C26H26N2O5 详情 详情
(XLVIII) 68743 (3R,3aS,4R,4aR,7S,9aS)-3-methyl-7-nitro-1-oxo-N,N-diphenyl-1,3,3a,4,4a,5,6,7,8,9a-decahydronaphtho[2,3-c]furan-4-carboxamide   C26H26N2O5 详情 详情
(XLIX) 68742 (3R,3aS,4R,4aR,7S,8aS,9aS)-7-amino-3-methyl-1-oxo-N,N-diphenyldodecahydronaphtho[2,3-c]furan-4-carboxamide   C26H30N2O3 详情 详情
(L) 68746 ethyl ((1R,3aR,4aR,6R,8aR,9S,9aS)-9-(benzo[d]thiazole-2-carbonyl)-1-methyl-3-oxododecahydronaphtho[2,3-c]furan-6-yl)carbamate   C24H28N2O5S 详情 详情
(LI) 68747 (3S,3aS,4R,4aS,7S,9aS)-benzyl 7-((ethoxycarbonyl)amino)-3-methyl-1-oxo-1,3,3a,4,4a,5,6,7,8,9a-decahydronaphtho[2,3-c]furan-4-carboxylate   C24H29NO6 详情 详情
Extended Information