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【结 构 式】

【分子编号】69374

【品名】6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2,4-dione

【CA登记号】

【 分 子 式 】C7H9NO2

【 分 子 量 】139.154

【元素组成】C 60.42% H 6.52% N 10.07% O 23%

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:(L)

In an alternative method to intermediate (XI), dehydration of caronic acid (XLV) by heating with Ac2O and H2SO4 in toluene at 190 °C produces caronic anhydride (XLVI) , which is then condensed with benzylamine in tert-butyl methyl ether at 170-180 °C to yield the bicyclic imide (XLVII). Subsequent reduction of imide (XLVII) with LiAlH4 in refluxing THF followed by debenzylation of the obtained pyrrolidine derivative (XLVIII) by catalytic hydrogenation over Pd/C in AcOH furnishes 6,6-dimethyl-3-azabicyclo[3.1.0]hexane (XLIX) .
Alternatively, caronic anhydride (XLVI) is reacted with NH4OH in H2O at 155 °C or THF at 180 °C to give 6,6-dimethyl-3-azabicyclo[3.1.0]-hexane-2,4-dione (L), which can also be prepared by debenzylation of intermediate (XLVII) with H2 in the presence of Pd/C or Pt/C. Reduction of imide (L) with LiAlH4 in refluxing THF then yields the bicyclic amine (XLIX). This secondary amine is converted to the corresponding imine (LII) by chlorination with NaClO in methyl tertbutyl ether, followed by treatment of the intermediate chloramine (LI) with NaOH in the presence of Bu4NOH or NBC in MeOH , or alternatively by direct oxidation of amine (XLIX) with K2S2O8 in the presence of AgNO3 and NaOH in acetonitrile. Addition of sodium bisulfite to the imine (LII) produces the racemic sulfonate (LIII), which upon cyanation with NaCN yields the α-amino nitrile (LIV). After methanolysis of nitrile (LIV) with HCl in MeOH/MTBE, resolution of the racemic amino ester employing di-p-toluoyl-D-tartaric acid in MeOH affords intermediate (XI) .

3 Smith, J.P. Treatment options for patients with hepatitis C: Role of pharmacists in optimizing treatment response and managing adverse events. Pharmacotherapy 2008, 28(9): 1151-61.
1 Kwok, D.-L., Lee, H.-C., Zavialov, I.A. (Schering Corp.). Dehydrohalogenation process for the preparation of intermediates useful in providing 6,6-dimethyl-3-azabicyclo-[3.1.0]-hexane compounds. WO 2009073380.
2 Berranger, T., Demonchaux, P. (Schering Corp.). Process for the preparation of 6,6-dimethyl-3-azabicyclo-[3.1.0]-hexane compounds utilizing bisulfite intermediate. WO 2008082508.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XI) 69339 methyl (1R,2S,5S)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylate HCl salt 565456-77-1 C9H15NO2.HCl 详情 详情
(XLV) 69369 3,3-dimethylcyclopropane-1,2-dicarboxylic acid 497-42-7 C7H10O4 详情 详情
(XLVI) 69370 6,6-dimethyl-3-oxabicyclo[3.1.0]hexane-2,4-dione C7H8O3 详情 详情
(XLVII) 69371 3-benzyl-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2,4-dione C14H15NO2 详情 详情
(XLVIII) 69372 3-benzyl-6,6-dimethyl-3-azabicyclo[3.1.0]hexane C14H19N 详情 详情
(XLIX) 69373 6,6-dimethyl-3-azabicyclo[3.1.0]hexane C7H13N 详情 详情
(L) 69374 6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2,4-dione C7H9NO2 详情 详情
(LI) 69375 3-chloro-6,6-dimethyl-3-azabicyclo[3.1.0]hexane C7H12ClN 详情 详情
(LII) 69376 6,6-dimethyl-3-azabicyclo[3.1.0]hex-2-ene C7H11N 详情 详情
(LIII) 69377 sodium 6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-sulfonate C7H12NNaO3S 详情 详情
(LIV) 69378 6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carbonitrile C8H12N2 详情 详情
Extended Information