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【结 构 式】

【分子编号】11986

【品名】N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]-N-ethylacetamide

【CA登记号】

【 分 子 式 】C15H20N2O2

【 分 子 量 】260.33608

【元素组成】C 69.2% H 7.74% N 10.76% O 12.29%

与该中间体有关的原料药合成路线共 4 条

合成路线1

该中间体在本合成路线中的序号:(IV)

The condensation of N-(3-acetylphenyl)acetamide (I) with dimethylformamide dimethylacetal (II) at reflux temperature gives N-[3-[3-(dimethylamino)-2-propenoyl]phenyl]acetamide (III), which is alkylated with NaH and ethyl iodide to the corresponding N-ethyl derivative (IV). Finally, this compound is cyclized with 3-aminopyrazole-4-carbonitrile (V) in refluxing acetic acid.

1 Mealy, N.; Castaner, J.; Zaleplon. Drugs Fut 1996, 21, 1, 37.
2 Dusza, J.P.; Tomcufcik, A.S.; Albright, J.D. (American Cyanamid Co.); [7-(3-Disubstd. amino)phenyl]pyrazolo[1,5-a]pyrimidines. EP 0208846; JP 1986260083; JP 1995084468; US 4626538 .
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) 11983 3'-Acetamidoacetophane; m-Acetamidoacetophenone; N-(3-Acetylphenyl)acetamide 7463-31-2 C10H11NO2 详情 详情
(II) 11984 N-(Dimethoxymethyl)-N,N-dimethylamine;dimethylformamide dimethylacetal;1,1-dimethoxy-N,N-dimethylmethanamine; Dimethoxy-N,N-dimethylmethanamine; N,N-Dimethylformamide dimethyl acetal 4637-24-5 C5H13NO2 详情 详情
(III) 11985 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]acetamide C13H16N2O2 详情 详情
(IV) 11986 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]-N-ethylacetamide C15H20N2O2 详情 详情
(V) 11987 3-Amino-4-pyrazolecarbonitrile; 3-Amino-1H-pyrazole-4-carbonitrile; 3-Amino-4-cyanopyrazole 16617-46-2 C4H4N4 详情 详情

合成路线2

该中间体在本合成路线中的序号:(II)

 

1 Koradi F. Feher F. Magyar E, Singer C. 2005. Preparation of N-[3-(3-cyanopyrazolo [1,5-a] pyrimidin-5-yl) phenyll-N-ethylacetamide, regioisamer of Zaleplon, and crystalline forms of Zaleplon. US 2005032818
2 Kankan RN, Rao DR. 2005. Zaleplon Synthesis, W0 2005023813
3 Korycinska M, Stawinski T, Wieczorek M. 2003. A process for the preparation of zaleplon via the cyclocondensation reaction of 3-dimethylamino-l-(3-N-ethyl-N-aoetylaminophenyl) -2-propen-l-one with 3- aminopyrazole-4-carborutrile in an aqueous solution of formic acid. W0 2003095456
4 Subramanian RS, Sathyanarayanan N, Janardhana PNR, et aL. 2005. Process for prepantion of N-[3-(3- cyanopynzolo [1,5-a] pyrimidin-7-yl) phenyl]-n-ethylacetamide. W0 2005099712
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) 11987 3-Amino-4-pyrazolecarbonitrile; 3-Amino-1H-pyrazole-4-carbonitrile; 3-Amino-4-cyanopyrazole 16617-46-2 C4H4N4 详情 详情
(II) 11986 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]-N-ethylacetamide C15H20N2O2 详情 详情

合成路线3

该中间体在本合成路线中的序号:(V)

 

1 Shen JS,Li JF,Li FW,et al. 2002.Synthesis of zaleplon.中国医药工业杂卷.33(7): 313~314
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) 49701 Acetic anhydride; Acetyl oxide 108-24-7 C4H6O3 详情 详情
(II) 66972 3-Aminoacetophenone;3-Amino acetophenone;m-Aminoacetophenone;1-(3-Aminophenyl)ethanone 99-03-6 C8H9NO 详情 详情
(III) 11983 3'-Acetamidoacetophane; m-Acetamidoacetophenone; N-(3-Acetylphenyl)acetamide 7463-31-2 C10H11NO2 详情 详情
(IV) 11985 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]acetamide C13H16N2O2 详情 详情
(V) 11986 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]-N-ethylacetamide C15H20N2O2 详情 详情
(VI) 11987 3-Amino-4-pyrazolecarbonitrile; 3-Amino-1H-pyrazole-4-carbonitrile; 3-Amino-4-cyanopyrazole 16617-46-2 C4H4N4 详情 详情

合成路线4

该中间体在本合成路线中的序号:(VI)

 

1 Zheng LY, Wang SQ, Li BC, et aL. 2001.Improvement on the synthetic technology of zaleplon as a new sedative and hypnoticdrug. 中国药物化学杂志,11 (6):353~355
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) 10317 Acetophenone 98-86-2 C8H8O 详情 详情
(II) 61934 1-(3-nitrophenyl)-1-ethanone;3-Nitroacetophenone;m-Nitroacetophenone 121-89-1 C8H7NO3 详情 详情
(III) 66972 3-Aminoacetophenone;3-Amino acetophenone;m-Aminoacetophenone;1-(3-Aminophenyl)ethanone 99-03-6 C8H9NO 详情 详情
(IV) 11983 3'-Acetamidoacetophane; m-Acetamidoacetophenone; N-(3-Acetylphenyl)acetamide 7463-31-2 C10H11NO2 详情 详情
(V) 11985 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]acetamide C13H16N2O2 详情 详情
(VI) 11986 N-[3-[(E)-3-(Dimethylamino)-2-propenoyl]phenyl]-N-ethylacetamide C15H20N2O2 详情 详情
(VII) 11987 3-Amino-4-pyrazolecarbonitrile; 3-Amino-1H-pyrazole-4-carbonitrile; 3-Amino-4-cyanopyrazole 16617-46-2 C4H4N4 详情 详情
Extended Information