• English
  • 简体中文
Login Register
Current Location: Home > Feedback Help Print

【结 构 式】

【分子编号】36061

【品名】1-methyl-4-thieno[2,3-c][2]benzothiepin-4(9H)-ylidenepiperidine

【CA登记号】

【 分 子 式 】C18H19NS2

【 分 子 量 】313.4876

【元素组成】C 68.97% H 6.11% N 4.47% S 20.46%

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:(VII)

The synthesis of pipethiadene (VII) is carried out by four steps from phthalide (I) and 2-thio-phenethiol (II). A solution of the sodium salt of (II) in ethanol, prepared by dissolving (II) in ethanolic sodium ethoxide, is refluxed with (I) to give 2-(2-thienylthiomethyl)benzoic acid (III). A modified procedure for preparing (III) consists of using the crude products of reactions of 2-thienylmagnesium bromide or 2-thienylmagnesium iodide sulfur instead of the Na salt of (II).The acid (III) is then cyclized either with polyphosphoric acid in the presence of boiling toluene, with phosphorus pentoxide in boiling toluene or with phosphoric ethyl ester in toluene at 100 C. The ketone (IV) is then treated with 1-methyl-4-piperidylmagnesium chloride (A) in tetrahydrofuran and the resulting amino alcohol (V) is dehydrated with boiling dilute sulfuric acid to give the desired (VII). More recently it has been established that the expected formation of (V) is accompanied by a 1,6-addition with the subsequent air-oxidation producing the byproduct (VI). This compound melts precisely at the same temperature as compound (V), and it is necessary to separate it on the basis of its good solubility in ethanol, in which (V) is almost insoluble in the cold. Neutralization of the base (VII) with (+)-tartaric acid in ethanol affords pipethiadene (+)-tartrate.

1 Protiva, M.; Rajsner, M.; US 3519649 .
2 Rajsner, M.; Vejdelek, Z.J.; Protiva, M.; Seidlova,V.; Adlerova, E.; Some new types of 6,11-dihydrodibenzo[b,e]thiepin derivatives and their analogues. Coll Czech Chem Commun 1964, 29, 2161.
3 Metys, J.; Rajsner, M.; Svatek, E.; Protiva, M.; Geometric isomerism of 4-(3-dimethylaminopropylidene)-9H-thieno[2,3-b]benzo[e]thiepin. Coll Czech Chem Commun 1974, 39, 1366.
4 Metys, J.; Protiva, M.; Svatek, E.; Rajsner, M.; 4,9-Dihyfrothieno[2,3-b]benzo[3]thiepin derivatives. Coll Czech Chem Commun 1967, 32, 2854.
5 Rajsner, M.; Protiva, M.; Metys, J.; Holubek, J.; Ryska, M.; Polívka, Z.; Svátek, E.; Antiaminic agents derived from thieno[2,3-c][2]benzothiepin: 4-(1-methyl-4-piperidylidene)-4,9-dihydroyhieno[2,3-c][2]benzothiepin and some related compounds. Coll Czech Chem Commun 1983, 48, 623.
6 Protiva, M.; Pipethiadene tartrate. Drugs Fut 1983, 8, 4, 334.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(A) 36058 chloro[(1-methyl-4-piperidinyl)methyl]magnesium C7H14ClMgN 详情 详情
(I) 12576 2-Benzofuran-1(3H)-one; Phthalide; Benzo[b]furan-1(3H)-one; 1(3H)-Isobenzofuranoneisobenzofuran-1-one 87-41-2 C8H6O2 详情 详情
(II) 16019 2-Thienylhydrosulfide; 2-Thiophenethiol 7774-74-5 C4H4S2 详情 详情
(III) 36056 2-[(2-thienylsulfanyl)methyl]benzoic acid C12H10O2S2 详情 详情
(IV) 36057 thieno[2,3-c][2]benzothiepin-4(9H)-one C12H8OS2 详情 详情
(V) 36059 4-(1-methyl-4-piperidinyl)-4,9-dihydrothieno[2,3-c][2]benzothiepin-4-ol C18H21NOS2 详情 详情
(VI) 36060 7-(1-methyl-4-piperidinyl)thieno[2,3-c][2]benzothiepin-4(9H)-one C18H19NOS2 详情 详情
(VII) 36061 1-methyl-4-thieno[2,3-c][2]benzothiepin-4(9H)-ylidenepiperidine C18H19NS2 详情 详情
(VIII) 28379 (2R,3R)-2,3-dihydroxybutanedioic acid; L-Tartaric acid; (2R,3R)-2,3-dihydroxysuccinic acid 87-69-4 C4H6O6 详情 详情
Extended Information