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【结 构 式】

【分子编号】53629

【品名】1-(1,3-benzodioxol-5-yl)-1-butanone

【CA登记号】63740-97-6

【 分 子 式 】C11H12O3

【 分 子 量 】192.21448

【元素组成】C 68.74% H 6.29% O 24.97%

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:(XIII)

The required (S)-alpha-propylpiperonyl alcohol (XV) was prepared by two alternative routes. Asymmetric addition of di-n-propyl zinc to piperonal (X) in the presence of titanium isopropoxide and the chiral bis-triflamide (XI) yielded the (S)-alcohol (XV) in high enantiomeric excess. Alternatively, ketone (XIII) was reduced with the oxazaborolidine-borane complex (XIV) to give (XV). Treatment of the (S)-alcohol (XV) with DPPA in the presence of DBU produced the (R)-azide (XVI). This was then reduced with LiAlH4 to yield amine (XVII) with some loss of optical purity. Optical enrichment was achieved by crystallization as the D-pyroglutamic acid salt. The (R)-amine (XVII) was converted to isocyanate (XVIII) by treatment with phosgene. Finally, coupling between isocyanate (XVIII) and azetidinone (IX) in the presence of DBU in acetonitrile led to the title compound.

1 Cvetovich, R.J.; et al.; An asymmetric synthesis of L-694,458, a human leukocyte elastase inhibitor, via novel enzyme resolution of beta-lactam esters. J Org Chem 1996, 61, 19, 6575.
2 Amato, J.S.; Cvetovich, R.; Hartner, F.W. (Merck & Co., Inc.); Process for preparing substd. azetidinones. WO 9716448 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IX) 53626 (4S)-3,3-diethyl-4-{4-[(4-methyl-1-piperazinyl)carbonyl]phenoxy}-2-azetidinone n/a C19H27N3O3 详情 详情
(X) 10127 1,3-Benzodioxole-5-carbaldehyde; Heliotropine 120-57-0 C8H6O3 详情 详情
(XI) 53627 trifluoro-N-((1R,2R)-2-{[(trifluoromethyl)sulfonyl]amino}cyclohexyl)methanesulfonamide n/a C8H12F6N2O4S2 详情 详情
(XIII) 53629 1-(1,3-benzodioxol-5-yl)-1-butanone 63740-97-6 C11H12O3 详情 详情
(XIV) 20631 (R)-Methyl oxazaborolidine; (3aR)-1-methyl-3,3-diphenyltetrahydro-3H-pyrrolo[1,2-c][1,3,2]oxazaborole 112022-83-0 C18H20BNO 详情 详情
(XV) 53628 (1S)-1-(1,3-benzodioxol-5-yl)-1-butanol n/a C11H14O3 详情 详情
(XVI) 53630 (1R)-1-(1,3-benzodioxol-5-yl)butyl azide; 5-[(1R)-1-azidobutyl]-1,3-benzodioxole n/a C11H13N3O2 详情 详情
(XVII) 53631 (1R)-1-(1,3-benzodioxol-5-yl)-1-butanamine; (1R)-1-(1,3-benzodioxol-5-yl)butylamine n/a C11H15NO2 详情 详情
(XVIII) 53632 5-[(1R)-1-isocyanatobutyl]-1,3-benzodioxole; (1R)-1-(1,3-benzodioxol-5-yl)butyl isocyanate n/a C12H13NO3 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XIII)

The preferred synthetic route began with the Friedel-Crafts acylation of benzodioxol (XXXVII) by means of butyric anhydride and BF3. The resultant butyrophenone (XIII) was then condensed with (R)-1-phenylethylamine (XXXVII), using TiCl4 as the dehydrating reagent, to afford the E-imine (XXXIX) as the major isomer. Catalytic hydrogenation of imine (XXXIX) in the presence of Raney-Ni furnished the desired amine (XL). The chiral auxiliary was then removed by hydrogenolysis over Pd/C to yield amine (XVII).

1 Storace, L.; et al.; An efficient large-scale process for the human leukocyte elastase inhibitor, DMP 777. Org Process Res Dev 2002, 6, 1, 54.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XIII) 53629 1-(1,3-benzodioxol-5-yl)-1-butanone 63740-97-6 C11H12O3 详情 详情
(XVII) 53631 (1R)-1-(1,3-benzodioxol-5-yl)-1-butanamine; (1R)-1-(1,3-benzodioxol-5-yl)butylamine n/a C11H15NO2 详情 详情
(XXVIII) 10039 (1R)-1-Phenylethylamine; (1R)-1-Phenyl-1-ethanamine.; L-alpha-Phenylethylamine 3886-69-9 C8H11N 详情 详情
(XXXVII) 50641 1,3-Dioxaindane; 1,3-Benzodioxole; methylenedioxybenzene; 1,2-methylenedioxybenzene; catechol methylene ether 274-09-9 C7H6O2 详情 详情
(XXXIX) 53649 (1R)-N-[(E)-1-(1,3-benzodioxol-5-yl)butylidene]-1-phenyl-1-ethanamine; N-[(E)-1-(1,3-benzodioxol-5-yl)butylidene]-N-[(1R)-1-phenylethyl]amine n/a C19H21NO2 详情 详情
(XL) 53650 N-[(1R)-1-(1,3-benzodioxol-5-yl)butyl]-N-[(1R)-1-phenylethyl]amine; (1R)-1-(1,3-benzodioxol-5-yl)-N-[(1R)-1-phenylethyl]-1-butanamine n/a C19H23NO2 详情 详情
Extended Information