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【结 构 式】 
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【分子编号】68238 【品名】ethyl 1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylate 【CA登记号】681807-59-0 |
【 分 子 式 】C13H21NO4 【 分 子 量 】255.31408 【元素组成】 61.16% H 8.29% N 5.49% O 25.07% |
合成路线1
该中间体在本合成路线中的序号：(VI)Condensation of ethyl glycinate hydrochloride (I) with benzaldehyde in the presence of Na2SO4 and Et3N in tert-butyl methyl ether gives ethyl N-benzylideneglycinate (II), which is then cyclocondensed with trans-1,4-dibromo-2-butene (III) by means of t-BuOLi in toluene to yield ethyl 1-amino-2-vinylcyclopropanecarboxylate (IV). Alternatively, condensation of ethyl N-(diphenylmethylene)glycinate (V) also with trans-1,4-dibromo-2-butene (III) by means of t-BuOK in THF affords cyclopropanecarboxylate (IV), which is then N-protected with Boc2O at reflux to generate N-Boc derivative (VI). Enzymatic resolution of the racemate (VI) by means of acalase or savinase (proteases from Bacillus clausii) or esperase (protease from Bacillus halodurans) in DMSO at 40 °C leads to the desired ethyl (1R,2S)-N-Boc-cyclopropanecarboxylate diastereomer (VII). Hydrolysis of ethyl ester (VII) with LiOH in THF/MeOH leads to the carboxylic acid (VIII), which is then coupled with cyclopropanesulfonamide (IX) using CDI and DBU in THF to provide the sulfonamide (X). N-Deprotection of this compound by means of TFA in CH2Cl2 followed by treatment with HCl in Et2O gives amine hydrochloride (XI) .
Cyclopropanesulfonamide (IX) is prepared by amination of 3-chloropropane-1-sulfonyl chloride (XII) with t-BuNH2 in THF to provide N-tert-butyl-3-chloropropane-1-sulfonamide (XIII), which is then cyclocondensed in the presence of BuLi in THF to yield N-tert-butylcyclopropanesulfonamide (XIV). Finally, the tert-butyl group of intermediate (XIV) is removed with TFA, affording cyclopropanesulfonamide (IX), which can also be prepared by direct amination of cyclopropanesulfonyl chloride (XV) with NH3 in THF .
| 【1】 Campbell, J.A., Wang, X.A., Sin, N. et al. (Bristol-Myers Squibb Co.). Hepatitis C virus inhibitors. EP 1505963, EP 2340830, JP 2005533028, KR 2010093140, US 200410659, US 6995174, US 2011311482, WO 200309974. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (X) | 68241 | tert-butyl ((1R,2S)-1-((cyclopropylsulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamate | C14H22N2O5S | 详情 | 详情 | |
| (XV) | 67915 | cyclopropanesulfonyl chloride;Cyclopropylsulfonylchloride;Cyclopropylsulphonyl chloride | 139631-62-2 | C3H5ClO2S | 详情 | 详情 |
| (I) | 68234 | ethyl glycinate hydrochloride；Glycine ethyl ester hydrochloride | 623-33-6 | C4H9NO2.HCl | 详情 | 详情 |
| (II) | 68235 | (E)-ethyl 2-(benzylideneamino)acetate;2-(benzylideneamino)acetic acid ethyl ester；ethyl N-benzylideneglycinate；Benzylideneglycine ethyl ester；N-Benzylideneglycineethyl ester；ethyl(benzylideneamino)acetate | 40682-54-0 | C11H13NO2 | 详情 | 详情 |
| (III) | 18349 | (E)-1,4-dibromo-2-butene；trans-1,4-dibromo-2-butene | 821-06-7 | C4H6Br2 | 详情 | 详情 |
| (IV) | 68236 | ethyl 1-amino-2-vinylcyclopropanecarboxylate | 787548-29-2 | C8H13NO2 | 详情 | 详情 |
| (V) | 68237 | ethyl N-(diphenylmethylene)glycinate；(Benzhydrylideneamino)aceticacid methyl ester;Benzophenoneimine glycine methyl ester;Methyl2-[(diphenylmethylene)amino]acetate;Methyl 3-aza-4,4-diphenylbut-3-enoate;Methyl N-(diphenylmethylene)glycinate;Methyl[(diphenylmethylene)amino]acetate;N-(Diphenylmethylene)glycine methyl ester;N-Diphenylmethylideneglycine methyl ester | 81167-39-7 | C16H15NO2 | 详情 | 详情 |
| (VI) | 68238 | ethyl 1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylate | 681807-59-0 | C13H21NO4 | 详情 | 详情 |
| (VII) | 68239 | ethyl (1R,2S)－1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylate | 213316-49-5 | C13H21NO4 | 详情 | 详情 |
| (VIII) | 68240 | (1R,2S)-1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylic acid | 213316-50-8 | C11H17NO4 | 详情 | 详情 |
| (IX) | 68242 | cyclopropanesulfonamide；Cyclopropanesulfonyl amide | 154350-29-5 | C3H7NO2S | 详情 | 详情 |
| (XI) | 68243 | tert-butyl ((1R,2S)-1-((cyclopropylsulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamate hydrochloride | C14H22N2O5S.HCl | 详情 | 详情 | |
| (XII) | 39225 | g-Chloropropanesulfonyl chloride;3-Chloropropansulfonyl chloride;1-Chloro-3-propanesulfonylchloride;3-Chloropropanesulfonyl chloride;3-chloro-1-propanesulfonyl chloride;3-chloropropane-1-sulfonyl chloride | 1633-82-5 | C3H6Cl2O2S | 详情 | 详情 |
| (XIII) | 68244 | N-tert-butyl-(3-chloro)propylsulfonamide;N-tert-butyl-3-chloropropane-1-sulfonamide;3-Chloro-N-(1,1-dimethylethyl)-1-propanesulfonamide;1-Propanesulfonamide,3-chloro-N-(1,1-dimethylethyl)- | 63132-85-4 | C7H16ClNO2S | 详情 | 详情 |
| (XIV) | 68245 | N-(tert-butyl)cyclopropanesulfonamide;N-tert-butylcyclopropanesulfonamide;N-(tert-butyl)cyclopropanesulfonamide | C7H15NO2S | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(XXXI)Condensation of benzaldehyde (XXVI) with ethyl glycinate hydrochloride (XXVII) by means of Na2SO4 and Et3N in tert-butyl methyl ether gives 2-(benzylideneamino)acetic acid ethyl ester (XXVIII), which cyclizes with 1,4-dibromo-2(E)-butene (XXIX) in the presence of t-BuOLi in dry toluene to yield, after imine hydrolysis, the cyclopropylamine derivative (XXX). Protection of amine (XXX) with Boc2O furnishes the racemic N-Boc amino ester (XXXI), which is subjected to kinetic resolution by means of enzymes such as Acalase®, Savinase® or Esperase® in DMSO to afford unreacted (1R,2S)-isomer (XXXII). Saponification of ethyl ester (XXXII) using LiOH in THF/MeOH gives the cyclopropanecarboxylic acid derivative (XXXIII), which, after activation with CDI in refluxing THF, is coupled with cyclopropanesulfonamide (XXXIV) (prepared by treatment of cyclopropanesulfonyl chloride [XXXV] with NH3 in THF) in the presence of DBU to yield the N-acylsulfonamide (XXXVI). Alternatively, the sulfonamide intermediate (XXXIV) can be prepared by condensation of 3-chloropropanesulfonyl chloride (XXXVIII) with tert-butylamine in THF to give N-tert-butyl-(3-chloro)propylsulfonamide (XXXIX), which then cyclizes to the cyclopropyl derivative (XL) by treatment with n-BuLi in THF at –78 °C. Removal of the N-tert-butyl group in intermediate (XL) using CF3CO2H then furnishes cyclopropanesulfonamide (XXXIV). After N-Boc group cleavage in (XXXVI) by means of CF3CO2H in DCM, acidification with HCl in Et2O affords intermediate (IV) . Intermediate (VIII) can be obtained by vinyl group reduction in (IV) with H2 and Pd/C in EtOAc. Intermediate (VIII) can also be obtained by reduction of vinylcyclopropylamine derivative (XXXVI) with H2 over Ru/C in MeOH to yield N-Boc-ethylcyclopropylamine (XXXVII), which is finally N-deprotected by means of HCl in CH2Cl2 .
| 【1】 Sun, L.-Q., Sit, S.-Y., Scola, P.M. et al. (Bristol-Myers Squibb Co.). Hepatitis C virus inhibitors. EP 1505963, JP 2005533028, US 2004106559, US 6995174, WO 2003099274. |
| 【2】 Holloway, M.K., Liverton, N.J., McCauley, J.A., Rudd, M.T., Vacca, J.P., Ludmerer, S.W., Olsen, D.B. (Merck & Co., Inc.). Macrocyclic peptides as HCV NS3 protease inhibitors. EP 1913016, JP 2009503080, WO 200701641. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (IV) | 69058 | (1S,2R)-1-amino-N-(cyclopropylsulfonyl)-2-vinylcyclopropanecarboxamide hydrochloride | C9H14N2O3S.HCl | 详情 | 详情 | |
| (VIII) | 69059 | (1S,2S)-1-amino-N-(cyclopropylsulfonyl)-2-ethylcyclopropanecarboxamide hydrochloride | C9H16N2O3S.HCl | 详情 | 详情 | |
| (XXVI) | 10498 | Benzaldehyde;Benzoic aldehyde;Phenylmethanal | 100-52-7 | C7H6O | 详情 | 详情 |
| (XXVII) | 67884 | methyl glycinate hydrochloride | 5680-79-5 | C3H7NO2.HCl | 详情 | 详情 |
| (XXVIII) | 68235 | (E)-ethyl 2-(benzylideneamino)acetate;2-(benzylideneamino)acetic acid ethyl ester；ethyl N-benzylideneglycinate；Benzylideneglycine ethyl ester；N-Benzylideneglycineethyl ester；ethyl(benzylideneamino)acetate | 40682-54-0 | C11H13NO2 | 详情 | 详情 |
| (XXIX) | 18349 | (E)-1,4-dibromo-2-butene；trans-1,4-dibromo-2-butene | 821-06-7 | C4H6Br2 | 详情 | 详情 |
| (XXX) | 68236 | ethyl 1-amino-2-vinylcyclopropanecarboxylate | 787548-29-2 | C8H13NO2 | 详情 | 详情 |
| (XXXI) | 68238 | ethyl 1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylate | 681807-59-0 | C13H21NO4 | 详情 | 详情 |
| (XXXII) | 69076 | (1R,2R)-ethyl 1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylate | C13H21NO4 | 详情 | 详情 | |
| (XXXIII) | 69077 | (1R,2R)-1-((tert-butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylic acid | C11H17NO4 | 详情 | 详情 | |
| (XXXIV) | 68242 | cyclopropanesulfonamide；Cyclopropanesulfonyl amide | 154350-29-5 | C3H7NO2S | 详情 | 详情 |
| (XXXV) | 67915 | cyclopropanesulfonyl chloride;Cyclopropylsulfonylchloride;Cyclopropylsulphonyl chloride | 139631-62-2 | C3H5ClO2S | 详情 | 详情 |
| (XXXVI) | 69078 | tert-butyl ((1R,2R)-1-((cyclopropylsulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamate | C14H22N2O5S | 详情 | 详情 | |
| (XXXVII) | 69079 | tert-butyl ((1R,2R)-1-((cyclopropylsulfonyl)carbamoyl)-2-ethylcyclopropyl)carbamate | C14H24N2O5S | 详情 | 详情 | |
| (XXXVIII) | 39225 | g-Chloropropanesulfonyl chloride;3-Chloropropansulfonyl chloride;1-Chloro-3-propanesulfonylchloride;3-Chloropropanesulfonyl chloride;3-chloro-1-propanesulfonyl chloride;3-chloropropane-1-sulfonyl chloride | 1633-82-5 | C3H6Cl2O2S | 详情 | 详情 |
| (XXXIX) | 68244 | N-tert-butyl-(3-chloro)propylsulfonamide;N-tert-butyl-3-chloropropane-1-sulfonamide;3-Chloro-N-(1,1-dimethylethyl)-1-propanesulfonamide;1-Propanesulfonamide,3-chloro-N-(1,1-dimethylethyl)- | 63132-85-4 | C7H16ClNO2S | 详情 | 详情 |
| (XL) | 68245 | N-(tert-butyl)cyclopropanesulfonamide;N-tert-butylcyclopropanesulfonamide;N-(tert-butyl)cyclopropanesulfonamide | C7H15NO2S | 详情 | 详情 |