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【结 构 式】

【分子编号】10918

【品名】6-Chloro-9-[2-(2,2-dimethyl-1,3-dioxan-5-yl)ethyl]-6,9-dihydro-1H-purin-2-ylamine; 6-Chloro-9-[2-(2,2-dimethyl-1,3-dioxan-5-yl)ethyl]-6,9-dihydro-1H-purin-2-amine

【CA登记号】

【 分 子 式 】C13H20ClN5O2

【 分 子 量 】313.787

【元素组成】C 49.76% H 6.42% Cl 11.3% N 22.32% O 10.2%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(X)

The synthesis of penciclovir by two related ways has been reported: 1) The reaction of 2-(hydroxymethyl)butane-1,4-diol (I) with formaldehyde (or an aldehyde such as trimethylacetaldehyde) (II) by means of H2SO4 (or p-toluenesulfonic acid, TsOH) gives the dioxane (III), which by reaction first with methanesulfonyl chloride and triethylamine and then with NaI in acetone affords the corresponding 5-(2-iodoethyl)-1,3-dioxane (IV). The reaction of (IV) with 2-amino-6-chloropurine (V) by means of K2CO3 in DMF gives the corresponding condensation product (VI), which is finally hydrolyzed and deprotected with refluxing 2M aqueous HCl. 2) The reaction of triol (I) with 2,2-dimethoxypropane (VII) by means of TsOH gives the corresponding 1,3-dioxane (VIII), which by reaction with triphenylphosphine and CBr4 is converted to the 5-(2-bromoethyl) derivative (IX). The reaction of (IX) with the purine (V) by means of K2CO3 as before affords the corresponding condensation product (X), which is hydrolyzed and deprotected with 2M HCl as before.

1 Grinter, T.J.; Choudary, B.M.; MacBeath, F.S.; Parratt, M.J.; Geen, G.R.; Influence of remote structure upon regioselectivity in the N-alkylation of 2-amino-6-chloropurine: Application to the synthesis of penciclovir. Nucleosides Nucleotides 1994, 13, 4, 979.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IIIa) 10911 2-(1,3-Dioxan-5-yl)-1-ethanol C6H12O3 详情 详情
(IVa) 10912 5-(2-Iodoethyl)-1,3-dioxane C6H11IO2 详情 详情
(VIa) 10914 6-Chloro-9-[2-(1,3-dioxan-5-yl)ethyl]-6,9-dihydro-1H-purin-2-amine; 6-Chloro-9-[2-(1,3-dioxan-5-yl)ethyl]-6,9-dihydro-1H-purin-2-ylamine C11H16ClN5O2 详情 详情
(I) 10910 2-(Hydroxymethyl)-1,4-butanediol C5H12O3 详情 详情
(V) 10913 6-Chloro-6,9-dihydro-1H-purin-2-ylamine; 6-Chloro-6,9-dihydro-1H-purin-2-amine C5H6ClN5 详情 详情
(VII) 10915 3,3-Dimethyl-2,4-pentanedione C7H12O2 详情 详情
(VIII) 10916 2-(2,2-Dimethyl-1,3-dioxan-5-yl)-1-ethanol C8H16O3 详情 详情
(IX) 10917 5-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxane C8H15BrO2 详情 详情
(X) 10918 6-Chloro-9-[2-(2,2-dimethyl-1,3-dioxan-5-yl)ethyl]-6,9-dihydro-1H-purin-2-ylamine; 6-Chloro-9-[2-(2,2-dimethyl-1,3-dioxan-5-yl)ethyl]-6,9-dihydro-1H-purin-2-amine C13H20ClN5O2 详情 详情
Extended Information