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Comparative evaluation of determination of beta-lactam intermediates.

Hindustan antibiotics bulletin (1993-08-01)
B S Deshpande, S S Ambedkar, J G Shewale
ABSTRACT

The Schiff's base formation between 6-aminopenicillanic acid, 7-aminodesacetoxycephalosporanic acid and 7-aminocephalosporanic acid and p-dimethylaminobenzaldehyde (PDAB) was investigated. The factors that affect the reaction such as concentration of PDAB, time and pH were studied and optimised for estimation of these intermediates.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, JIS special grade, ≥99.0%
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, puriss. p.a., reag. Ph. Eur., ≥99% (perchloric acid titration)
Supelco
4-(Dimethylamino)benzaldehyde solution, 10 g/L in isopropanol, for TLC derivatization
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, suitable for histochemical demonstration of nitro blue tetrazolium reduction in neutrophils
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, 98%
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, ACS reagent, 99%
Millipore
Kovac′s reagent for indoles, suitable for microbiology
Millipore
Kovac′s reagent for indoles, suitable for microbiology