1,2-Dichloroethane → Terephthaloyl chloride

HRID 65886

Reaktionsgleichung

Reaktionsgleichung von HRID 65886
[C:1]([OH:12])(=[O:11])[C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=O)=[CH:4][CH:3]=1.[C:13]([Cl:16])(Cl)=[O:14].[Cl:17][CH2:18]CCl>N1C=CC=CC=1>[C:6]([O:14][CH3:13])(=[O:8])[C:5]1[CH:4]=[CH:3][C:2]([C:1]([O:12][CH3:18])=[O:11])=[CH:10][CH:9]=1.[C:13]([Cl:16])(=[O:14])[C:5]1[CH:9]=[CH:10][C:2]([C:1]([Cl:17])=[O:12])=[CH:3][CH:4]=1

Komponenten

6

Edukt 3

HCID 111,2-DichloroethaneHCID 6371PhosgeneHCID 7489Terephthalic Acid

Produkt 2

HCID 7488Terephthaloyl chlorideHCID 8441Dimethyl terephthalate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1049PyridineLösungsmittel2×

Versuchsvorschrift

Following the general procedure of Example 1 for the preparation of the diacid chloride, 10.31 parts of terephthalic acid were added to a mixture of 10.57 parts pyridine and 14.5 parts phosgene in 200 parts dry 1,2-dichloroethane at 25° to 30° C. The ratio of equivalents of pyridine base/COOH acid group was 1.08. After carrying out the reaction and esterifying the resulting diacid chloride by the procedure described in Example 1, a 95% yield of theory of dimethyl terephthalate was obtained corresponding to a 95% yield of theory of terephthaloyl chloride formed initially in the reaction.

Aufarbeitung

  1. customthe reaction

Quellen und Nachweise

ORD-Eintrag
ord-1802ca8856d748ad8fe7e7ccb16c48f6
Quelldatensatz
uspto-grants-1978_12
Patentnummer
US04129594

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