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【结 构 式】

【分子编号】58017

【品名】(4S)-4-(3-chloropropyl)-2,2-dimethyl-1,3-dioxolane

【CA登记号】

【 分 子 式 】C8H15ClO2

【 分 子 量 】178.6586

【元素组成】C 53.78% H 8.46% Cl 19.84% O 17.91%

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)

(3-Ethylphenyl)cyanamide (III) was prepared by treatment of m-ethylaniline (I) with cyanogen bromide (II) in Et2O. Alkylation of (III) with iodomethane and NaH provided the N-methyl cyanamide (IV). This was finally condensed with 1-naphthylamine hydrochloride (V) by heating at 160 C or in the presence of AlCl3 as the catalyst.

1 Weber, E.; Keana, J.F.W. (University of Oregon); Tri- and tetra-substd. guanidines and their use as excitatory amino acid antagonists. JP 2002020361; US 5262568; WO 9112797 .
2 Durant, G.J.; Nagar, S.S. (CeNeS Pharmaceuticals); Preparation of substd. guanidines. WO 9319042 .
3 Reddy, N.L.; et al.; Synthesis and structure-activity studies of N,N'-diarylguanidine derivatives. N-(1-naphthyl)-N'-(3-ethylphenyl)-N'-methylguanidine: A new, selective noncompetitive NMDA receptor antagonist. J Med Chem 1994, 37, 2, 260.
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) 59208 3-Ethylaniline; m-Ethylaniline 587-02-0 C8H11N 详情 详情
(II) 58017 (4S)-4-(3-chloropropyl)-2,2-dimethyl-1,3-dioxolane C8H15ClO2 详情 详情
(III) 59209 3-ethylphenylcyanamide C9H10N2 详情 详情
(IV) 59210 3-ethylphenyl(methyl)cyanamide C10H12N2 详情 详情
(V) 59211 1-Aminonaphthalene; 1-Naphthylamine; alpha-Naphthylamine 134-32-7 C10H9N 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XXIII)

In a related method, keto ester (XX) was prepared by Claisen condensation of the lithium enolate of octyl acetate (XVIII) with 4-chlorobutanoyl chloride (XIX). Reduction of the beta-keto ester (XX) with baker's yeast gave rise to the (S)-alcohol (XXI). Subsequent ester group reduction in (XXI) with LiBH4 furnished diol (XXII), which was protected as the acetonide (XXIII) upon treatment with 2,2-dimethoxypropane under acidic conditions. Displacement of the chloride of (XXIII) with the sodium salt of diethyl malonate afforded the substituted malonate (XXIV). Decarbethoxylation of malonate (XXIV) to mono-ester (XXV) was accomplished employing NaCN in hot DMSO. The target dihydroxy ester (XII) was then obtained by acidic acetonide (XXV) hydrolysis.

1 Jacobs, H.K.; Gopalan, A.S.; Bakers' yeast reduction of alkyl 6-chloro-3-oxohexanoates: Synthesis of (R)-(+)-alpha-lipoic acid. J Chem Soc - Perkins Trans I 1990, 7, 1897.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XII) 57958 ethyl (6S)-6,8-dihydroxyoctanoate C10H20O4 详情 详情
(XVIII) 58013 octyl acetate C10H20O2 详情 详情
(XIX) 11265 4-Chlorobutanoyl chloride; 4-Chlorobutyric acid chloride 4635-59-0 C4H6Cl2O 详情 详情
(XX) 58014 octyl 6-chloro-3-oxohexanoate C14H25ClO3 详情 详情
(XXI) 58015 octyl (3S)-6-chloro-3-hydroxyhexanoate C14H27ClO3 详情 详情
(XXII) 58016 (3S)-6-chloro-1,3-hexanediol C6H13ClO2 详情 详情
(XXIII) 58017 (4S)-4-(3-chloropropyl)-2,2-dimethyl-1,3-dioxolane C8H15ClO2 详情 详情
(XXIV) 58018 diethyl 2-{3-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]propyl}malonate C15H26O6 详情 详情
(XXV) 58019 ethyl 5-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]pentanoate C12H22O4 详情 详情
Extended Information