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【结 构 式】

【分子编号】15869

【品名】4-bromobenzylamine; (4-bromophenyl)methanamine

【CA登记号】26177-44-6

【 分 子 式 】C7H8BrN

【 分 子 量 】186.05126

【元素组成】C 45.19% H 4.33% Br 42.95% N 7.53%

与该中间体有关的原料药合成路线共 3 条

合成路线1

该中间体在本合成路线中的序号:(V)

1) The cyclization of 2-acetylglutaric acid diethyl ester (I) with acetamidine (II) by means of sodium ethoxide in refluxing ethyl ether gives the pyrimidinone derivative (III), which by treatment with refluxing phosphorus oxychloride is converted into the chloropyrimidine (IV). The cyclization of (IV) with 4-bromobenzylamine (V) by means of NaHCO3 in refluxing butanol affords 8-(4-bromobenzyl)-2,4-dimethyl-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidin-7-one (VI), which is condensed with 2-(2-tert-butyltetrazol-5-yl)phenylboronic acid (VII) by means of tetrakis(triphenylphosphine)palladium in refluxing toluene/ethanol to give 8-[2'-(2-tert-butyltetrazol-5-yl)biphenyl-4-ylmethyl]-2,4-dimethyl-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidin-7-one (VIII). Finally, this compound is deprotected with methanesulfonic acid in refluxing toluene. (1,2) 2) The boronic acid (VII) has been obtained as follows: The cyclization of 2-bromobenzonitrile (IX) with sodium azide in hot DMF, followed by protection with tert-butanol in trifluoroacetic acid/H2SO4 gives 5-(2-bromophenyl)-2-tertbutyltetrazole (X), which is finally condensed with triisopropyl borate by means of butyllithium in THF and hydrolyzed with HCl. (1,2)

1 Merlos, M.; Casas, A.; Castaner, J.; Tasosartan. Drugs Fut 1997, 22, 8, 850.
2 Ellingboe, J.W.; Nikaido, M.; Bagli, J. (American Home Products Corp.); Substd. pyridopyrimidines useful as angiotensin II antagonists. EP 0539086; US 5149699; US 5256654 .
3 Ellingboe, J.W.; Antane, M.; Nguyen, T.T.; et al.; Pyrido[2,3-p]pyrimidine angiotensin II antagonists. J Med Chem 1994, 37, 4, 542-50.
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) 15865 Diethyl 2-acetylglutarate; diethyl 2-acetylpentanedioate 1501-06-0 C11H18O5 详情 详情
(II) 15866 ethanimidamide C2H6N2 详情 详情
(III) 15867 ethyl 3-(2,4-dimethyl-6-oxo-1,6-dihydro-5-pyrimidinyl)propanoate C11H16N2O3 详情 详情
(IV) 15868 ethyl 3-(4-chloro-2,6-dimethyl-5-pyrimidinyl)propanoate C11H15ClN2O2 详情 详情
(V) 15869 4-bromobenzylamine; (4-bromophenyl)methanamine 26177-44-6 C7H8BrN 详情 详情
(VI) 15870 8-(4-bromobenzyl)-2,4-dimethyl-5,8-dihydropyrido[2,3-d]pyrimidin-7(6H)-one C16H16BrN3O 详情 详情
(VII) 15871 2-[2-(tert-butyl)-2H-1,2,3,4-tetraazol-5-yl]phenylboronic acid C11H15BN4O2 详情 详情
(VIII) 15872 8-([2'-[2-(tert-butyl)-2H-1,2,3,4-tetraazol-5-yl][1,1'-biphenyl]-4-yl]methyl)-2,4-dimethyl-5,8-dihydropyrido[2,3-d]pyrimidin-7(6H)-one C27H29N7O 详情 详情
(IX) 15541 o-bromobenzonitrile; 2-bromobenzonitrile 2042-37-7 C7H4BrN 详情 详情
(X) 15874 5-(2-bromophenyl)-2-(tert-butyl)-2H-1,2,3,4-tetraazole C11H13BrN4 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XIV)

3) The iodination of 2,6-dimethylpyrimidin-4-ol (IX) with I2/NaOH in refluxing water gives 5-iodo-2,6-dimethylpyrimidin-4-ol (X), which is treated with POCl3 in refluxig toluene yielding 4-chloro-5-iodo-2,6-dimethylpyrimidine (XI). The reaction of (XI) with (1-ethoxyvinyl)tributyltin (XII) catalyzed by tetrakis(triphenylphosphine)palladium in refluxing dioxane affords 4-chloro-5-(1-ethoxyvinyl)-2,6-dimethylpyrimidine (XIII), which is condensed with 4-bromobenzylamine (XIV) by means of NaHCO3 in refluxing butanol giving 4-(4-bromobenzylamino)-5-(1-ethoxyvinyl)-2,6-dimethylpyrimidine (XV). The hydrolysis of (XV) with HCl in refluxing acetone yields the corresponding acetyl derivative (XVI), which is condensed with 2-(2-tert-butyl-2H-tetrazol-5-yl)phenylboronic acid (XVII) by means of tetrakis(triphenylphosphine)palladium to afford the biphenyl derivative (XVIII). The cyclization of (XVIII) with diethyl carbonate and NaH in hot THF gives 8-[2'-(2-tert-butyl-2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-5-hydroxy-2,4-dimethylpyrido[2,3-d]pyrimidin-7(8H)-one (XIX), which is finally deprotected with trifluoromethanesulfonic acid in refluxing toluene to give metabolite (III).

1 Ellingboe, J.W.; Collini, M.D.; Quagliato, D.; Chen, J.; Antane, M.; Schmid, J.; Hartupee, D.; White, V.; Park, C.H.; Tanikella, T.; Bagli, J.F.; Metabolites of the angiotensin II antagonist tasosartan: The importance of a second acidic group. J Med Chem 1998, 41, 22, 4251.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(III) 26028 5-hydroxy-2,4-dimethyl-8-[[2'-(1H-1,2,3,4-tetraazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]pyrido[2,3-d]pyrimidin-7(8H)-one C23H19N7O2 详情 详情
(IX) 26029 2,6-dimethyl-4-pyrimidinol 6622-92-0 C6H8N2O 详情 详情
(X) 26030 5-iodo-2,6-dimethyl-4-pyrimidinol C6H7IN2O 详情 详情
(XI) 26031 4-chloro-5-iodo-2,6-dimethylpyrimidine C6H6ClIN2 详情 详情
(XII) 19760 ethyl 1-(tributylstannyl)vinyl ether; tributyl(1-ethoxyvinyl)stannane 97674-02-7 C16H34OSn 详情 详情
(XIII) 26032 1-(4-chloro-2,6-dimethyl-5-pyrimidinyl)vinyl ethyl ether; 4-chloro-5-(1-ethoxyvinyl)-2,6-dimethylpyrimidine C10H13ClN2O 详情 详情
(XIV) 15869 4-bromobenzylamine; (4-bromophenyl)methanamine 26177-44-6 C7H8BrN 详情 详情
(XV) 26033 N-(4-bromobenzyl)-5-(1-ethoxyvinyl)-2,6-dimethyl-4-pyrimidinamine; N-(4-bromobenzyl)-N-[5-(1-ethoxyvinyl)-2,6-dimethyl-4-pyrimidinyl]amine C17H20BrN3O 详情 详情
(XVI) 26034 1-[4-[(4-bromobenzyl)amino]-2,6-dimethyl-5-pyrimidinyl]-1-ethanone C15H16BrN3O 详情 详情
(XVII) 15871 2-[2-(tert-butyl)-2H-1,2,3,4-tetraazol-5-yl]phenylboronic acid C11H15BN4O2 详情 详情
(XVIII) 26035 1-[4-[([2'-[2-(tert-butyl)-2H-1,2,3,4-tetraazol-5-yl][1,1'-biphenyl]-4-yl]methyl)amino]-2,6-dimethyl-5-pyrimidinyl]-1-ethanone C26H29N7O 详情 详情
(XIX) 26036 8-([2'-[2-(tert-butyl)-2H-1,2,3,4-tetraazol-5-yl][1,1'-biphenyl]-4-yl]methyl)-5-hydroxy-2,4-dimethylpyrido[2,3-d]pyrimidin-7(8H)-one C27H27N7O2 详情 详情

合成路线3

该中间体在本合成路线中的序号:(VII)

The mercaptoimidazole (IX) was prepared by condensation between 4-bromobenzylamine (VII), 1,3-dihydroxyacetone (VIII) and potassium thiocyanate. Oxidative desulfuration of (IX) with hydrogen peroxide in acidic medium yielded imidazole (X). The biphenyl derivative (XII) was obtained by Suzuki coupling of aryl bromide (X) with 4-(trifluoromethyl)benzeneboronic acid (XI). Subsequent oxidation of the alcohol group of (XII) under Swern conditions gave aldehyde (XIII). Finally, reductive coupling of aldehyde (XIII) with piperazinone (VI) in the presence of sodium triacetoxyborohydride furnished the title compound.

2 Williams, T.M. (Merck & Co., Inc.); Biaryl inhibitors of prenyl-protein transferase. WO 0075135 .
1 Kohl, N.E.; Nguyen, D.N.; Lobell, R.B.; Williams, T.M.; Heimbrook, D.C.; Buser, C.A.; Huber, H.E.; Stump, C.A.; Graham, S.L.; Potent inhibitors of farnesyltransferase and geranylgeranyltransferase. 221st ACS Natl Meet (April 1 2001, San Diego) 2001, Abst MEDI 56.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VI) 47289 1-(3-chlorophenyl)-2-piperazinone C10H11ClN2O 详情 详情
(VII) 15869 4-bromobenzylamine; (4-bromophenyl)methanamine 26177-44-6 C7H8BrN 详情 详情
(VIII) 14575 Dihydroxyacetone; 1,3-dihydroxyacetone 96-26-4 C3H6O3 详情 详情
(IX) 48637 [1-(4-bromobenzyl)-2-sulfanyl-1H-imidazol-5-yl]methanol C11H11BrN2OS 详情 详情
(X) 48638 [1-(4-bromobenzyl)-1H-imidazol-5-yl]methanol C11H11BrN2O 详情 详情
(XI) 48639 4-(Trifluoromethyl)phenylboronic acid C7H6BF3O2 详情 详情
(XII) 48640 (1-[[4'-(trifluoromethyl)[1,1'-biphenyl]-4-yl]methyl]-1H-imidazol-5-yl)methanol C18H15F3N2O 详情 详情
(XIII) 48641 1-[[4'-(trifluoromethyl)[1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carbaldehyde C18H13F3N2O 详情 详情
Extended Information