alpha-Cyano-beta-(2-Nitro-4,5-Dimethoxyphenyl)Acrylamide → 2-Amino-6,7-dimethoxyquinoline-3-carboxamide

HRID 442200

Reaktionsgleichung

[C:1]([C:3](=[CH:7][C:8]1[CH:13]=[C:12]([O:14][CH3:15])[C:11]([O:16][CH3:17])=[CH:10][C:9]=1[N+:18]([O-])=O)[C:4]([NH2:6])=[O:5])#[N:2]>[Fe].C(O)(=O)C.CN(C)C=O>[CH3:15][O:14][C:12]1[CH:13]=[C:8]2[C:9](=[CH:10][C:11]=1[O:16][CH3:17])[N:18]=[C:1]([NH2:2])[C:3]([C:4]([NH2:6])=[O:5])=[CH:7]2

Komponenten

Reaktionsbedingungen

Temperatur: 90 °C

Versuchsvorschrift

Iron powder (65.2 g., 1.22 moles) is added over a period of one-half hour to a slurry of α-cyano-β-(2-nitro-4,5-dimethoxyphenyl)acrylamide (75.0 g., 0.271 mole) in a 50% solution of acetic acid-N,N-dimethylformamide (750 ml.) at 75° C. When addition of the iron powder is complete, the mixture is heated to 90° C. for four hours and then filtered while hot. The filter cake is washed with hot acetic acid (150 ml.). The dark red filtrate is gradually added to IN hydrochloric acid (1500 ml.) and the pink precipitate recovered by filtration and recrystallized from an excess (10%) of aqueous sodium hydroxide. The solid is filtered, washed with cold isopropanol and dried to give the title product as yellow crystals: Yield = 57.1 g. (83.5%), mpp. 274°-275° C.

Aufarbeitung

filtrationfiltered while hot
washThe filter cake is washed with hot acetic acid (150 ml.)
additionThe dark red filtrate is gradually added to IN hydrochloric acid (1500 ml.)
filtrationthe pink precipitate recovered by filtration
customrecrystallized from an excess (10%) of aqueous sodium hydroxide
filtrationThe solid is filtered
washwashed with cold isopropanol
customdried

Quellen und Nachweise

ORD-Eintrag: ord-ccce012241904a2392c7a204d43ef870
Quelldatensatz: uspto-grants-1977_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US04044134

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