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【结 构 式】

【分子编号】20674

【品名】N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone

【CA登记号】13889-98-0

【 分 子 式 】C6H12N2O

【 分 子 量 】128.17416

【元素组成】C 56.23% H 9.44% N 21.86% O 12.48%

与该中间体有关的原料药合成路线共 7 条

合成路线1

该中间体在本合成路线中的序号:(IV)

Benzocycloheptapyridinone (I) was reduced to alcohol (II) with NaBH4 in MeOH. Subsequent treatment of (II) with SOCl2 in toluene gave the tricyclic chloride (III). Finally, alkylation of N-acetyl piperazine (IV) with chloride (III) in the presence of Et3N in boiling THF provided the title compound.

1 Piwinski, J.J.; Wong, J.K.; Green, M.J.; Kaminski, J.J.; Colizzo, F.; Albanese, M.M.; Ganguly, A.K.; Billah, M.M.; Anthes, J.C.; West, R.E. Jr; Dual antagonists of platelet activating factor and histamine 3. Synthesis, biological activity and conformational implications of substituted N-acyl-bis-arylcycloheptapiperazines. Bioorg Med Chem Lett 1998, 8, 24, 3469.
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) 16504 8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-one; 8-Chloro-10,11-dihydro-4-aza-5H-dibenzo[a,d]cycloheptan-5-one 31251-41-9 C14H10ClNO 详情 详情
(II) 17935 8-chloro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ol C14H12ClNO 详情 详情
(III) 17936 8,11-dichloro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine C14H11Cl2N 详情 详情
(IV) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情

合成路线2

该中间体在本合成路线中的序号:(II)

Coupling of 4-chloro-3-nitrocinnamic acid (I) with 1-acetylpiperazine (II) using EDC gave rise to the corresponding amide (III). Displacement of the chlorine atom of (III) with 2-isopropylthiophenol (IV) in the presence of K2CO3 furnished the title thioether.

1 Liu, G.; et al.; Discovery of novel p-arylthio cinnamides as antagonists of leukocyte function-associated antigen-1/intracellular adhesion molecule-1 interaction. 1. Identification of an additional binding pocket based on an anilido diaryl sulfide lead. J Med Chem 2000, 43, 21, 4025.
2 Lynch, J.K.; Link, J.; Zhu, G.-D.; Boyd, S.A.; Winn, M.; Pei, Z.; Gunawardana, I.W.; Liu, G.; Xin, Z.; Jae, H.-S.; Freeman, J.C.; Von Geldern, T.; Staeger, M.A. (Abbott Laboratories Inc.); Cell adhesion-inhibiting antiinflammatory and immune-suppressive cpds.. US 6110922; WO 0039081 .
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) 44325 (E)-3-(4-chloro-3-nitrophenyl)-2-propenoic acid 20797-48-2 C9H6ClNO4 详情 详情
(II) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情
(III) 44326 (E)-1-(4-acetyl-1-piperazinyl)-3-(4-chloro-3-nitrophenyl)-2-propen-1-one C15H16ClN3O4 详情 详情
(IV) 44327 2-isopropylbenzenethiol; 2-isopropylphenylhydrosulfide C9H12S 详情 详情

合成路线3

该中间体在本合成路线中的序号:(V)

Reaction of 3,4-dichlorobenzalzehyde (I) with methyl 3-mercaptopropionate in the presence of K2CO3 in hot DMF afforded the thioether (II). Subsequent condensation of (II) with malonic acid under Knoevenagel conditions produced the substituted cinnamic acid (III), which was further converted to the corresponding acid chloride (IV) upon treatment with oxalyl chloride and a catalytic amount of DMF. Coupling of acid chloride (IV) with N-acetylpiperazine (V) furnished amide (VI). Treatment of (VI) with potassium tert-butoxide caused the elimination of methyl acrylate, producing the potassium thiolate (VII). Thiolate (VII) was then condensed with 1-methyl-7-bromoindole (VIII) to give the title compound.

1 Lynch, J.K.; Link, J.; Zhu, G.-D.; Boyd, S.A.; Winn, M.; Pei, Z.; Gunawardana, I.W.; Liu, G.; Xin, Z.; Jae, H.-S.; Freeman, J.C.; Von Geldern, T.; Staeger, M.A. (Abbott Laboratories Inc.); Cell adhesion-inhibiting antiinflammatory and immune-suppressive cpds.. US 6110922; WO 0039081 .
2 Jae, H.-S.; Pei, Z.; Staeger, M.A.; Gunawardana, I.W.; Winn, M.; Freeman, J.C.; Liu, G.; Link, J.; Boyd, S.A.; Zhu, G.-D.; Von Geldern, T.W.; Xin, Z.; Lynch, J.K.; Wang, S. (Abbott Laboratories Inc.); Cell adhesion-inhibiting antiinflammatory and immune-suppressive cpds.. WO 0059880 .
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) 18122 3,4-Dichlorobenzaldehyde 6287-38-3 C7H4Cl2O 详情 详情
(II) 48173 methyl 3-[(2-chloro-4-formylphenyl)sulfanyl]propanoate C11H11ClO3S 详情 详情
(III) 48174 (E)-3-[3-chloro-4-[(3-methoxy-3-oxopropyl)sulfanyl]phenyl]-2-propenoic acid C13H13ClO4S 详情 详情
(IV) 48175 methyl 3-([2-chloro-4-[(E)-3-chloro-3-oxo-1-propenyl]phenyl]sulfanyl)propanoate C13H12Cl2O3S 详情 详情
(V) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情
(VI) 48176 methyl 3-([4-[(E)-3-(4-acetyl-1-piperazinyl)-3-oxo-1-propenyl]-2-chlorophenyl]sulfanyl)propanoate C19H23ClN2O4S 详情 详情
(VII) 48177 potassium 4-[(E)-3-(4-acetyl-1-piperazinyl)-3-oxo-1-propenyl]-2-chlorobenzenethiolate C15H16ClKN2O2S 详情 详情
(VIII) 29521 5-bromo-1-methyl-1H-indole C9H8BrN 详情 详情

合成路线4

该中间体在本合成路线中的序号:(VI)

Aromatic nucleophilic substitution of 3-chloro-4-fluorobenzaldehyde (I) with methyl 3-mercaptopropionate (II) yielded the mercapto aldehyde (III). This was subjected to Knoevenagel condensation with malonic acid to furnish the cinnamic acid derivative (IV), which was further converted to the corresponding acid chloride (V) by using oxalyl chloride. Condensation of acid chloride (V) with N-acetylpiperazine (VI) yielded the diacyl piperazine (VII). The protected benzenethiol of (VII) was released by treatment of the beta-mercaptopropionate (VII) with potassium tert-butoxide to give the potassium thiolate (VIII). Finally, Ullmann coupling of (VIII) with 6-iodobenzodioxan (IX) furnished the title compound.

1 Liu, G.; Okasinski, O.F.; DeVries, P.; Mendoza, R.; Leitza, S.; Olejniczak, E.T.; von Geldern, T.W.; Huth, J.R.; Fesik, S.W.; Reilly, E.B.; Novel p-arylthio cinnamides as antagonists of leukocyte function-associated antigen-1/intracellular adhesion molecule-1 interaction. 2. Mechanism of inhibition and structure-based improvement of pharmaceutical properties. J Med Chem 2001, 44, 8, 1202.
2 Jae, H.-S.; Pei, Z.; Staeger, M.A.; Gunawardana, I.W.; Winn, M.; Freeman, J.C.; Liu, G.; Link, J.; Boyd, S.A.; Zhu, G.-D.; Von Geldern, T.W.; Xin, Z.; Lynch, J.K.; Wang, S. (Abbott Laboratories Inc.); Cell adhesion-inhibiting antiinflammatory and immune-suppressive cpds.. WO 0059880 .
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) 49749 3-Chloro-4-fluorobenzaldehyde; 4-Fluoro-3-chlorobenzaldehyde 34328-61-5 C7H4ClFO 详情 详情
(II) 11418 methyl 3-sulfanylpropanoate; Methyl 3-mercaptopropionate 2935-90-2 C4H8O2S 详情 详情
(III) 48173 methyl 3-[(2-chloro-4-formylphenyl)sulfanyl]propanoate C11H11ClO3S 详情 详情
(IV) 48174 (E)-3-[3-chloro-4-[(3-methoxy-3-oxopropyl)sulfanyl]phenyl]-2-propenoic acid C13H13ClO4S 详情 详情
(V) 48175 methyl 3-([2-chloro-4-[(E)-3-chloro-3-oxo-1-propenyl]phenyl]sulfanyl)propanoate C13H12Cl2O3S 详情 详情
(VI) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情
(VII) 48176 methyl 3-([4-[(E)-3-(4-acetyl-1-piperazinyl)-3-oxo-1-propenyl]-2-chlorophenyl]sulfanyl)propanoate C19H23ClN2O4S 详情 详情
(VIII) 48177 potassium 4-[(E)-3-(4-acetyl-1-piperazinyl)-3-oxo-1-propenyl]-2-chlorobenzenethiolate C15H16ClKN2O2S 详情 详情
(IX) 49750 3,4-Ethylenedioxyiodobenzene 57744-67-9 C8H7IO2 详情 详情

合成路线5

该中间体在本合成路线中的序号:(VII)

The reductocondensation of 3-amino-5-(chloromethyl)benzoic acid methyl ester (I) with 2-aminothiazol-5-ylisothiocyanate (II) by means of NaBH4 gives the thioether (III), which is condensed with 4-(dimethylamino)benzoyl chloride (IV) by means of pyridine in dichloromethane to yield the amide (V). The hydrolysis of the ester group of (V) with NaOH in methanol affords the corresponding carboxylic acid (VI), which is finally condensed with 1-acetylpiperazine (VII) by means of WSC, HATU and DIEA in THF to provide the target piperazide.

1 Wityak, J.; Das, J.; Liu, C.; Lin, J.; Spergel, S.H.; Moquin, R.V.; Furch, J.A.; Doweiko, A.; Kanner, S.; Lin, T.-A.; Selective Emt inhibitors: Discovery and SAR of 2-amino-[(5-thiomethyl)aryl]thiazoles. 225th ACS Natl Meet (March 23 2003, New Orleans) 2003, Abst MEDI 257.
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) 64135 methyl 3-amino-5-(chloromethyl)benzoate C9H10ClNO2 详情 详情
(II) 64136 2-amino-1,3-thiazole-5-sulfenyl cyanide 23056-10-2 C4H3N3S2 详情 详情
(III) 64137 methyl 3-amino-5-{[(2-amino-1,3-thiazol-5-yl)sulfanyl]methyl}benzoate C12H13N3O2S2 详情 详情
(IV) 39988 4-(dimethylamino)benzoyl chloride 4755-50-4 C9H10ClNO 详情 详情
(V) 64138 methyl 3-amino-5-{[(2-{[4-(dimethylamino)benzoyl]amino}-1,3-thiazol-5-yl)sulfanyl]methyl}benzoate C21H22N4O3S2 详情 详情
(VI) 64139 3-amino-5-{[(2-{[4-(dimethylamino)benzoyl]amino}-1,3-thiazol-5-yl)sulfanyl]methyl}benzoic acid C20H20N4O3S2 详情 详情
(VII) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情

合成路线6

该中间体在本合成路线中的序号:(VII)

Casopitant can be prepared by two related methods starting from either racemic 2-(4-fluoro-2-methylphenyl)-4-piperidinone (I) or from the corresponding (R)-enantiomer (II). Optically pure piperidinone (II), obtained either by asymmetric synthesis or by resolution of (I) with L-mandelic acid, is treated with triphosgene and NaHCO3 to give the carbamoyl chloride (III), which is then coupled with N-methyl-1(R)-[3,5-(bis-trifluoromethyl)phenyl]ethylamine (IV) to afford the urea adduct (V). Alternatively, reaction of racemic piperidinone (I) with triphosgene and DIEA followed by coupling of the resulting carbamoyl chloride (VI) with the 1-aryl-ethylamine (IV) leads to a diastereomeric mixture of urea adducts, from which the target (R,R)-diastereoisomer (V) can be isolated using flash column chromatography. The N-carbamoyl piperidone (V) is then subjected to reductive amination with N-acetylpiperazine (VII) in the presence of NaBH(OAc)3 to generate a mixture of epimeric 4-piperazinylpiperidines, from which the 4(S)-isomer casopitant is finally obtained through recrystallization as the corresponding methanesulfonate salt (1, 2). Scheme 1.

1 Alvaro, G., Di Fabio, R., Tranquillini, M.E., Tampieri, M., Maragni, P. (GlaxoSmithKline plc). Chemical compounds. EP 1326832, EP 1524266, EP 1752449, EP 1921064, JP 2004511544, US 2004014770, US 2005137208, US 2006142302, US 2008021041, US 7060702, US 7119092, US 7294630, WO 2002032867.
2 Christensen, S.R., Merlo Pich, E., Ratti, E., Yamada, T. (Glaxo Group Ltd.). Novel use. WO 2008046882.
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) 65727 2-(4-Fluoro-2-methylphenyl)-4-piperidinone   C12H14FNO 详情 详情
(II) 65728 (2R)-(4-Fluoro-2-methylphenyl)-4-piperidinone   C12H14FNO 详情 详情
(III) 65729     C13H13ClFNO2 详情 详情
(IV) 65730 (R)-N-Methyl-1-[3,5-bis(trifluoromethyl)phenyl]ethylamine 334477-60-0 C11H11F6N 详情 详情
(V) 65731     C24H23F7N2O2 详情 详情
(VI) 65732     C13H13ClFNO2 详情 详情
(VII) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情

合成路线7

该中间体在本合成路线中的序号:(II)

 

1 Pleiss U. 2003. Synthesis of [3H] vardenaffi,levitra, using a new labeling technique. J Label Comp Radiopharm, 46 (13): 1241~1247
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) 66919 4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydroimidazo[5,1-f][1,2,4]triazin-2-yl)benzenesulfonic acid   C17H20N4O5S 详情 详情
(II) 20674 N-Acetyl piperazine; 1-(1-piperazinyl)-1-ethanone 13889-98-0 C6H12N2O 详情 详情
(III) 66920 2-(5-((4-acetylpiperazin-1-yl)sulfonyl)-2-ethoxyphenyl)-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(3H)-one   C23H30N6O5S 详情 详情
(V) 44355 4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydroimidazo[5,1-f][1,2,4]triazin-2-yl)benzenesulfonyl chloride C17H19ClN4O4S 详情 详情
Extended Information