Formation of a cyclic derivative of ethacrynic acid with diazomethane.

Abstract:

:Samples of ethacrynic acid were treated with methanol-hydrochloric acid or with diazomethane. GLC and mass spectrometric analysis indicated that the methanol-hydrochloric acid reaction gave the expected methyl ester, whereas diazomethane treatment gave a compound containing an additional 14 mass units. Accurate mass measurement and PMR and IR spectra showed that this product was a cyclic derivative of the methyl ester of ethacrynic acid, methyl 4-(2,3-dihydro-4-ethyl-5-furyl)-2,3-dichlorophenoxyacetate. Either derivatization method can be used for development of an assay for ethacrynic acid.

journal_name

J Pharm Sci

authors

Midha KK,Hubbard JW,Charette C,Jun HW

doi

10.1002/jps.2600670728

subject

Has Abstract

pub_date

1978-07-01 00:00:00

pages

975-8

issue

7

eissn

0022-3549

issn

1520-6017

pii

S0022-3549(15)42114-8

journal_volume

67

pub_type

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