3, 4-Dihydro-3-methyl-6-nitro-2H-1, 3-benzoxazin-2-one, a Reagent for Labeling p-Nitrophenyl Esterases with a Chromophoric Reporter Group-Synthesis and …

TM Kitson, GH Freeman

Index: Kitson, Trevor M.; Freeman, Graham H. Bioorganic Chemistry, 1993 , vol. 21, # 3 p. 354 - 365

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Citation Number: 17

Abstract

Abstract We report the synthesis of 3, 4-dihydro-3-methyl-6-nitro-2H-l, 3-benzoxazin-2-one (DMNB), a close structural analogue of p-nitrophenyl dimethylcarbamate. DMNB is unstable in aqueous solution when exposed to light, but is stable in the dark. The compound reacts slowly with chymotrypsin as an analogue of the substrate, p-nitrophenyl acetate, and this results in the incorporation of a p-nitrophenol-containing" reporter group" within the ...