Diethyl Ether → 3-[1-(1-Ethyl-piperidin-4-yl)-indol-3-yl]-4-(1-methyl-indol-3-yl)-pyrrole-2,5-dione

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Reaktionsgleichung

[CH2:1]([N:3]1[CH2:8][CH2:7][CH:6]([N:9]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[CH:11]=[CH:10]2)[CH2:5][CH2:4]1)[CH3:2].[C:18](Cl)(=[O:22])[C:19](Cl)=O.Cl.[C:25](=[NH:28])([OH:27])[CH3:26].[C:29](=[NH:32])([O-])[CH3:30].[C:33]1(C)[CH:38]=[CH:37][C:36](S(O)(=O)=O)=[CH:35][CH:34]=1.[CH3:44]COCC>C(Cl)Cl>[CH2:1]([N:3]1[CH2:8][CH2:7][CH:6]([N:9]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[C:11]([C:26]3[C:25](=[O:27])[NH:28][C:18](=[O:22])[C:19]=3[C:30]3[C:38]4[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=4)[N:32]([CH3:44])[CH:29]=3)=[CH:10]2)[CH2:5][CH2:4]1)[CH3:2]

Komponenten

Reaktionsbedingungen

Temperatur: 0 °C

Versuchsvorschrift

1-(1-ethyl-piperidin-4-yl)-indole (350 mg, 1.53 mmol) was dissolved in ether (6 mL), cooled to 0° C. and oxalyl chloride (0,175 mL, 2 mmol) was slowly added. After 30 minutes, the precipitate which formed was collected and suspended in dry methylene chloride. (10 mL). To this suspension was added isopropyl(1-methyl)indol-3-yl)acetimidate hydrochloride (410 mg, 1.53 mmol), followed by the dropwise addition of isopropyl(1-methyl)indol-3-yl)acetimidate (1.07 mL, 7.65 mmol) in dry methylene chloride (3 mL). After 3.5 hours, p-toluene sulfonic acid (1.16 g, 6.12 mmol) was added in several portions (slightly exothermic reaction) and stirring continued for an additional hour. Title compound was isolated as described in Example 39. Recrystallization from dioxane yielded 180 mg of bright orange crystals (26% yield). M. pt.: >250° C.

Aufarbeitung

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Quellen und Nachweise

ORD-Eintrag: ord-e43ef987ddff4d679e0920221bf8cea2
Quelldatensatz: uspto-grants-1997_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US05661173

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