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【结 构 式】

【分子编号】30913

【品名】bromo[4-[2-(1-piperidinyl)ethoxy]phenyl]magnesium

【CA登记号】

【 分 子 式 】C13H18BrMgNO

【 分 子 量 】308.50106

【元素组成】C 50.61% H 5.88% Br 25.9% Mg 7.88% N 4.54% O 5.19%

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:(IX)

The hydrolysis of 2-(dimethylamino)-6-methoxybenzo[b]thiophene (I) with HCl in refluxing THF gives 6-methoxybenzo[b]thiophen-2(3H)-one (II), which is condensed with 4-methoxybenzaldehyde (III) by means of piperidine in methanol yielding the 3-benzylidene derivative (IV). The rearrangement of (IV) with the same catalyst and solvent affords trans-6-methoxy-2-(4-methoxyphenyl)-2,3-dihydrobenzo[b]thiophene-3-carboxylic acid methyl ester (V), which is hydrolyzed with NaOH in methanol to the corresponding acid (VI). The reaction of (VI) with SOCl2 in dichloromethane gives the acyl chloride (VII), which is condensed with N,O-dimethylhydroxylamine by means of triethylamine in dichloromethane providing the N-methoxy-N-methylamide (VIII). The condensation of (VIII) with the Grignard reagent (IX) in THF affords the dimethyl ether of the target compound (X), which is finally demethylated with AlCl3 and propanethiol in dichloromethane. The intermediate Grignard reagent (IX) has been obtained by condensation of 4-bromophenol (XI) with 1-(2-chloroethyl)piperidine (XII) by means of K2CO3 in hot DMF to give 1-[2-(4-bromophenoxy)ethyl]piperidine (XIII), which is then treated with magnesium in THF to afford (IX).

1 Stephenson, G.A.; Glasebrook, A.L.; Schmid, C.R.; Misner, J.W.; Synthesis and biological activity of trans-2,3-dihydroraloxifene. Bioorg Med Chem Lett 1999, 9, 8, 1137.
2 Glasebrook, A.L.; Schmid, C.R.; Stephenson, G.A.; Misner, J.W.; Synthesis and biological activity of dihydroraloxifene. 217th ACS Natl Meet (March 21 1999, Anaheim) 1999, Abst MEDI 072.
3 Misner, J.W.; Schmid, C.R. (Eli Lilly and Company); Intermediates and processes for preparing benzo[b]thiophenes. EP 0979076; WO 9848793 .
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) 30906 N-(6-methoxy-1-benzothiophen-2-yl)-N,N-dimethylamine; 6-methoxy-N,N-dimethyl-1-benzothiophen-2-amine C11H13NOS 详情 详情
(II) 30907 6-methoxy-1-benzothiophen-2(3H)-one C9H8O2S 详情 详情
(III) 27251 4-methoxybenzaldehyde; Anisicaldehyde; p-anisaldehyde 123-11-5 C8H8O2 详情 详情
(IV) 30908 6-methoxy-3-[(Z)-(4-methoxyphenyl)methylidene]-1-benzothiophen-2-one C17H14O3S 详情 详情
(V) 30909 methyl (2R,3S)-6-methoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzothiophene-3-carboxylate C18H18O4S 详情 详情
(VI) 30910 (2R,3S)-6-methoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzothiophene-3-carboxylic acid C17H16O4S 详情 详情
(VII) 30911 (2R,3R)-6-methoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzothiophene-3-carbonyl chloride C17H15ClO3S 详情 详情
(VIII) 30912 (2R,3S)-N,6-dimethoxy-2-(4-methoxyphenyl)-N-methyl-2,3-dihydro-1-benzothiophene-3-carboxamide C19H21NO4S 详情 详情
(IX) 30913 bromo[4-[2-(1-piperidinyl)ethoxy]phenyl]magnesium C13H18BrMgNO 详情 详情
(X) 30914 [(2R,3S)-6-methoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzothiophen-3-yl][4-[2-(1-piperidinyl)ethoxy]phenyl]methanone C30H33NO4S 详情 详情
(XI) 25313 4-bromophenol 106-41-2 C6H5BrO 详情 详情
(XII) 10117 1-(2-Chloroethyl)piperidine; N-(2-Chloroethyl)piperidine 1932-03-2 C7H14ClN 详情 详情
(XIII) 30915 4-bromophenyl 2-(1-piperidinyl)ethyl ether; 1-[2-(4-bromophenoxy)ethyl]piperidine C13H18BrNO 详情 详情
Extended Information