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【结 构 式】

【分子编号】49940

【品名】 

【CA登记号】

【 分 子 式 】C40H39N3O9S

【 分 子 量 】737.83048

【元素组成】C 65.12% H 5.33% N 5.7% O 19.52% S 4.35%

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)

Indolizinone (I) was converted to the cyclic ketal (III) upon treatment with 2,2-dimethyl-1,3-propanediol (II) in the presence of p-toluenesulfonic acid. Carbethoxylation of (III) with diethyl carbonate and NaH afforded ester (IV), which was halogenated with either bromine or N-chlorosuccinimide to produce the corresponding alpha-bromo (V) or alpha-chloro (VI) ester, respectively. Sulfonylation of (R)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (VII) with 4-biphenylylsulfonyl chloride (VIII) provided the chiral auxiliary (IX). This was then condensed with halo ester (V) or (VI) in the presence of K2CO3 to furnish adduct (X). Diastereoselective alkylation of the sodium enolate of (X) with ethyl iodide produced (XI) as the major isomer. The cyano group of (XI) was then converted to acetamide (XII) by catalytic hydrogenation over Raney nickel in the presence of Ac2O and HOAc. Subsequent nitrosation of amide (XII) with NaNO2 in Ac2O/HOAc gave acetate ester (XIII).

1 Nomura, S.; Tsujihara, K.; Kawaguchi, T. (Tanabe Seiyaku Co., Ltd.); S type 2-substd. hydroxy-2-indolidinylbutyric ester cpds. and process for preparation thereof. US 6277992 .
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) 15640 7-methyl-1,5-dioxo-1,2,3,5-tetrahydro-6-indolizinecarbonitrile C10H8N2O2 详情 详情
(II) 12641 Neopentyl glycol; 2,2-Dimethyl-1,3-propanediol 126-30-7 C5H12O2 详情 详情
(III) 49934   C15H18N2O3 详情 详情
(IV) 49935   C18H22N2O5 详情 详情
(V) 49936   C18H21BrN2O5 详情 详情
(VI) 49937   C18H21ClN2O5 详情 详情
(VII) 49944 D-1,2,3,4-Tetrahydroisoquinoline-3-carboxylic acid 41220-48-8 C10H11NO2 详情 详情
(VIII) 49939 4-Biphenylsulfonyl chloride 1623-93-4 C12H9ClO2S 详情 详情
(IX) 49938 (3R)-2-([1,1'-biphenyl]-4-ylsulfonyl)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid C22H19NO4S 详情 详情
(X) 49940   C40H39N3O9S 详情 详情
(XI) 49941   C42H43N3O9S 详情 详情
(XII) 49942   C44H49N3O10S 详情 详情
(XIII) 49943   C44H48N2O11S 详情 详情
Extended Information