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【结 构 式】

【分子编号】33328

【品名】2-(p-Benzyloxyphenyl)ethanol; 2-[4-(Benzyloxy)phenyl]-1-ethanol

【CA登记号】

【 分 子 式 】C15H16O2

【 分 子 量 】228.29084

【元素组成】C 78.92% H 7.06% O 14.02%

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:(IV)

The condensation of ethyl p-hydroxyphenylacetate (I) with benzyl chloride (II) by means of sodium ethoxide in refluxing ethanol gives ethyl p-(benzyloxy)phenylacetate (III), which is reduced with LiAlH4 in THF to 2-(p-benzyloxyphenyl)ethanol (IV). The etherification of (IV) with cyclopropyl bromide (A) by means of NaH in hot DMF affords 4-(cyclopropylmethoxyethyl)-1-benzyloxybenzene (V), which is debenzylated by hydrogenation with H2 and Pd/C in methanol giving rise to p-(cyclopropylmethoxyethyl)phenol (VI). The condensation of (VI) with epichlorohydrin (B) by means of NaOH in water yields 1-[p-(cyclopropylmethoxyethyl)phenoxy]-2,3-epoxypropane (VII), which is treated with isopropylamine (C) and finally with HCl in ether.

1 Manoury, P.M.J.; et al. (Sanofi-Synthelabo ); Phenol ethers. DE 2649605; FR 2330383; GB 1515978; JP 52085146; US 4252984 .
2 Hillier, K.; Castaner, J.; Serradell, M.N.; Blancafort, P.; Betaxolol hydrochloride. Drugs Fut 1979, 4, 12, 867.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(B) 10146 Epichlorohydrin; 2-(Chloromethyl)oxirane 106-89-8 C3H5ClO 详情 详情
(A) 22277 Cyclopropyl bromide; 1-(Bromomethyl)cyclopropane 7051-34-5 C4H7Br 详情 详情
(I) 24994 Ethyl 2-(4-hydroxyphenyl)acetate 17138-28-2 C10H12O3 详情 详情
(II) 19171 1-(Chloromethyl)benzene; Benzyl chloride 100-44-7 C7H7Cl 详情 详情
(III) 28637 Ethyl 2-[4-(benzyloxy)phenyl]acetate; p-(Benzyloxy)phenylacetate C17H18O3 详情 详情
(IV) 33328 2-(p-Benzyloxyphenyl)ethanol; 2-[4-(Benzyloxy)phenyl]-1-ethanol C15H16O2 详情 详情
(V) 33329 4-(Cyclopropylmethoxyethyl)-1-benzyloxybenzene; 1-(Benzyloxy)-4-[2-(cyclopropylmethoxy)ethyl]benzene; Benzyl 4-[2-(cyclopropylmethoxy)ethyl]phenyl ether C19H22O2 详情 详情
(VI) 33330 4-[2-(Cyclopropylmethoxy)ethyl]phenol; p-(Cyclopropylmethoxyethyl)phenol C12H16O2 详情 详情
(VII) 33331 2-([4-[2-(Cyclopropylmethoxy)ethyl]phenoxy]methyl)oxirane; 1-[p-(Cyclopropylmethoxyethyl)phenoxy]-2,3-epoxypropane; 4-[2-(Cyclopropylmethoxy)ethyl]phenyl 2-oxiranylmethyl ether C15H20O3 详情 详情
(C) 23933 2-Propanamine; Isopropylamine 75-31-0 C3H9N 详情 详情

合成路线2

该中间体在本合成路线中的序号:(VII)

The intermediate carboxylic acid (XIII) was prepared as follows: 2-(4-Hydroxyphenyl)ethanol (VI) was selectively protected at the phenolic hydroxyl with benzyl bromide, yielding (VII). Subsequent oxidation of the aliphatic alcohol group of (VII) with Dess-Martin periodinane reagent provided aldehyde (VIII). Wadsworth-Emmons condensation of (VIII) with the sodium derivative of phosphonate (IX) furnished adduct (X), which was further hydrogenated over Pd/C to the saturated ester (XI). The phenolic hydroxyl group of (XI), which was concomitantly debenzylated in the preceding hydrogenation step, was further reprotected as the methoxymethyl ether (XII). Acid (XIII) was then obtained by basic hydrolysis of ester (XII).

1 Takaoka, E.; et al.; Catalytic asymmetric synthesis of arbutamine. Heterocycles 1997, 46, 157.
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) 47355 4-(2-hydroxyethyl)phenol 501-94-0 C8H10O2 详情 详情
(VII) 33328 2-(p-Benzyloxyphenyl)ethanol; 2-[4-(Benzyloxy)phenyl]-1-ethanol C15H16O2 详情 详情
(VIII) 55597 2-[4-(benzyloxy)phenyl]acetaldehyde C15H14O2 详情 详情
(IX) 10019 Ethyl 2-(diethoxyphosphoryl)acetate; Triethyl phosphonoacetate 867-13-0 C8H17O5P 详情 详情
(X) 55598 ethyl (E)-4-[4-(benzyloxy)phenyl]-2-butenoate C19H20O3 详情 详情
(XI) 55599 ethyl 4-(4-hydroxyphenyl)butanoate C12H16O3 详情 详情
(XII) 55600 ethyl 4-[4-(methoxymethoxy)phenyl]butanoate C14H20O4 详情 详情
(XIII) 55601 4-[4-(methoxymethoxy)phenyl]butanoic acid C12H16O4 详情 详情
Extended Information