Acetic Anhydride → 3-(2,4-Bis(diethylamino)phenyl)-3-(2-methyl-4-(diethylamino)phenyl)phthalide

HRID 839356

Reaktionsgleichung

[CH3:1][C:2]1[CH:18]=[C:17]([N:19]([CH2:22][CH3:23])[CH2:20][CH3:21])[CH:16]=[CH:15][C:3]=1[C:4]([C:6]1[CH:14]=[CH:13][CH:12]=[CH:11][C:7]=1[C:8](O)=[O:9])=[O:5].[CH2:24]([N:26]([CH2:38][CH3:39])[C:27]1[CH:32]=[CH:31][CH:30]=[C:29]([N:33]([CH2:36][CH3:37])[CH2:34][CH3:35])[CH:28]=1)[CH3:25].C(OC(=O)C)(=O)C>O>[CH2:36]([N:33]([CH2:34][CH3:35])[C:29]1[CH:28]=[C:27]([N:26]([CH2:38][CH3:39])[CH2:24][CH3:25])[CH:32]=[CH:31][C:30]=1[C:4]1([C:3]2[CH:15]=[CH:16][C:17]([N:19]([CH2:22][CH3:23])[CH2:20][CH3:21])=[CH:18][C:2]=2[CH3:1])[C:6]2[C:7](=[CH:11][CH:12]=[CH:13][CH:14]=2)[C:8](=[O:9])[O:5]1)[CH3:37]

Komponenten

Reaktionsbedingungen

Temperatur: 40 °C

Versuchsvorschrift

A mixture of 2-(2-methyl-4-(diethylamino)benzoyl)benzoic acid (12.48 g.), N,N,N',N'-tetraethyl-m-phenylenediamine (10.56 g.) and acetic anhydride (12 ml.) was warmed (at 40±8° C.) during one hour, diluted with water (50 ml., then 100 ml.), adjusted to pH 4.6 and filtered. The filtrate was clarified with water and adjusted to pH 5.5. Recrystallization of the resulting product (m.p. 134°-140° C.) from methanol afforded 3-(2,4-bis(diethylamino)phenyl)-3-(2-methyl-4-(diethylamino)phenyl)phthalide (I: X = Y4 = (CH3CH2)2N, Y2 = CH3, Z4 = Z5 = Z6 = Z7 = H) (m.p. 149°-151° C.).

Aufarbeitung

filtrationfiltered
customRecrystallization of the resulting product (m.p. 134°-140° C.) from methanol

Quellen und Nachweise

ORD-Eintrag: ord-cc48aec9b63c4c20a9bdd0d489fd456d
Quelldatensatz: uspto-grants-1978_06
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US04094877

Verknüpfte Notizen

Wird geladen…