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【结 构 式】

【分子编号】40066

【品名】9,10-dibromo-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one

【CA登记号】

【 分 子 式 】C13H8Br2OS

【 分 子 量 】372.07992

【元素组成】C 41.96% H 2.17% Br 42.95% O 4.3% S 8.62%

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:(II)

Compound can be prepared in two ditferent ways both starting from 9,10-dibromo-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-one (II): 1) The reaction of compound (II) with refluxing methanol affords 9-bromo-10-methoxy-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-one (III), which is dehydrobrominated with KOH in refluxing methanol giving 10-methoxy-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-one (IV). The condensation of compound (IV) with the magnesium derivative of 4-chloro-1-methylpiperidine (A) in THF yields 10-methoxy-4-(1-methyl-4-piperidyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-ol (V), which is finally dehydrated and demethylated with 3N HCl at 95-100 C. 2) The dehydrobromination of compound (II) with KOH in refluxing methanol affords 10-bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-one (VI), which is then condensed with the magnesium derivative of 4-chloro-1-methylpiperidine in THF giving 10-bromo-4-(1-methyl-4-piperidyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-ol (VII). This compound is dehydrated with 14% ethanolic HBr at 100 C giving 10-bromo-4-(1-methyl-4-piperidylidene)-4H-benzo[4,5]cyclohepta[1,2-b]thiophene (VIII) (2,3), which is finally hydrolyzed with 50% H2SO4 at 100 C. Compound (VIII) can be also be treated with piperidine and potassium terbutylate in dioxane at 130 C to give 10-piperidino-4-(1-methyl-4-piperidylidene)-4H-benzo[4,5]cyclohepta[1,2-b]thiophene (IX), which is finally hydrolyzed with refluxing 2N HCl. The starting material (II) is prepared by bromination of 9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-one (I) with N-bromosuccinimide (B) and benzoyl peroxide in carbon tetrachloride.

1 Bourquin, J.P.; et al.; Substittued 4H-benzo[4,5]cyclohepta[1,2-b]thiophen-10(9H)-ones. CA 947767; DE 2144490; FR 2107917; GB 1355537; US 3682930 .
2 Bourquin, J.P.; et al.; Substittued 4H-benzo[4,5]cyclohepta[1,2-b]thiophen-10(9H)-ones. DE 2111071; FR 2107917; GB 1355537; US 3682930 .
3 Castañer, J.; Hillier, K.; Ketotifen. Drugs Fut 1977, 2, 2, 108.
4 Bourquin, J.P.; et al. (Novartis AG); Process for the production of benzocycloheptathiophenone derivative. DE 2302970; FR 2169091; FR 2401153; GB 1422443; GB 1422444; JP 48081869; JP 55129282 .
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) 10158 Piperidine 110-89-4 C5H11N 详情 详情
(A) 20645 chloro(1-methyl-4-piperidinyl)magnesium C6H12ClMgN 详情 详情
(I) 40065 9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one 1622-55-5 C13H10OS 详情 详情
(II) 40066 9,10-dibromo-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one C13H8Br2OS 详情 详情
(III) 40067 9-bromo-10-methoxy-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one C14H11BrO2S 详情 详情
(IV) 40068 10-methoxy-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one C14H10O2S 详情 详情
(V) 40069 10-methoxy-4-(1-methyl-4-piperidinyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ol C20H23NO2S 详情 详情
(VI) 40070 10-bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one C13H7BrOS 详情 详情
(VII) 40071 10-bromo-4-(1-methyl-4-piperidinyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ol C19H20BrNOS 详情 详情
(VIII) 40072 4-(10-bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ylidene)-1-methylpiperidine C19H18BrNS 详情 详情
(IX) 40073 1-methyl-4-[10-(1-piperidinyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ylidene]piperidine C24H28N2S 详情 详情
Extended Information