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【结 构 式】

【分子编号】28085

【品名】3-amino-2,2-dimethylpentanoic acid

【CA登记号】

【 分 子 式 】C7H15NO2

【 分 子 量 】145.20164

【元素组成】C 57.9% H 10.41% N 9.65% O 22.04%

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:(II)

Metrifonate is totally unique among the acetylcholinesterase inhibitors currently used or proposed for the treatment of Alzheimer's disease because it is an inactive prodrug. The active compound dichlorvos, (2,2-dichlorovinyl dimethylphosphate; DDVP), is formed in a nonenzymatic reaction by hydrolysis and elimination of HCl followed by rearrangement of an intermediate according to Scheme.

1 Mucke, H.A.M.; Metrifonate. Drugs Fut 1998, 23, 5, 491.
2 Giang, P.A.; Barthel, W.F.; Hall, S.A.; Dialkylalpha-hydroxyphosphonates derived from chloral. J Am Chem Soc 1954, 76, 4186-7.
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) 28084 dimethyl 2,2-dichloro-1-hydroxyvinylphosphonate C4H7Cl2O4P 详情 详情
(II) 28085 3-amino-2,2-dimethylpentanoic acid C7H15NO2 详情 详情

合成路线2

该中间体在本合成路线中的序号:(I)

Protection of beta-alanine derivative (I) with di-tert-butyl dicarbonate afforded the tert-butyl carbamate (II). This was condensed with ethyl piperidine-4-acetate (III) using O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyuronium hexafluorophosphate (HATU) and diisopropyl ethylamine to give amide (IV). Subsequent Boc deprotection of (IV) with trifluoroacetic acid provided amine (V), which was coupled with 2-fluoro-4-cyanobenzoic acid (VI) in the presence of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and 1-hydroxybenzotriazole yielding (VII). Treatment of the resulting cyanobenzamide (VII) with SH2 and Et3N produced the corresponding thioamide, which was S-alkylated with MeI to give (VIII). Finally, displacement of the methylthio group of (VIII) with thiazolidine (IX) furnished the corresponding amidine.

1 Hayashi, Y.; Harada, T.; Katada, J.; et al.; GPIIb/IIIa integrin antagonists with the new conformational restriction unit, trisubstituted beta-amino acid derivatives, and substituted benzamidine structure. J Med Chem 1998, 41, 12, 2345.
2 Hayashi, Y.; Harada, T.; Tachiki, A.; Katada, J. (Nippon Steel Corp.); Fibrinogen receptor antagonists and medicinal preparations containing the same as the active ingredient. EP 0852225; JP 1998017550; WO 9749682 .
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) 28085 3-amino-2,2-dimethylpentanoic acid C7H15NO2 详情 详情
(II) 28086 3-[(tert-butoxycarbonyl)amino]-2,2-dimethylpentanoic acid C12H23NO4 详情 详情
(III) 28087 4-Piperidineacetic acid ethyl ester; ethyl 2-(4-piperidinyl)acetate C9H17NO2 详情 详情
(IV) 28088 ethyl 2-(1-[3-[(tert-butoxycarbonyl)amino]-2,2-dimethylpentanoyl]-4-piperidinyl)acetate C21H38N2O5 详情 详情
(V) 28089 ethyl 2-[1-(3-amino-2,2-dimethylpentanoyl)-4-piperidinyl]acetate C16H30N2O3 详情 详情
(VI) 28090 4-cyano-2-fluorobenzoic acid C8H4FNO2 详情 详情
(VII) 28091 ethyl 2-(1-[3-[(4-cyano-2-fluorobenzoyl)amino]-2,2-dimethylpentanoyl]-4-piperidinyl)acetate C24H32FN3O4 详情 详情
(VIII) 28092 ethyl 2-[1-[3-([2-fluoro-4-[imino(methylsulfanyl)methyl]benzoyl]amino)-2,2-dimethylpentanoyl]-4-piperidinyl]acetate C25H36FN3O4S 详情 详情
(IX) 28093 1,3-thiazolidine 504-78-9 C3H7NS 详情 详情
Extended Information