Structural factors influencing the reaction rates of 4-aryloxy-7-nitrobenzofurazans with amino acids

Author:

Bem Marioara1,Vasilescu Marilena2,Caproiu Miron3,Draghici Constantin3,Beteringhe Adrian1,Constantinescu Titus1,Banciu Mircea4,Balaban Alexandru5

Affiliation:

1. 1Laboratory of Supramolecular Chemistry and Interphase Processes, Institute “I.G. Murgulescu” of Physical Chemistry of Roumanian Academy, Splaiul Independentei 202, 77208, Bucharest, Roumania

2. 2Structure Laboratory, Institute “I.G. Murgulescu” of Physical Chemistry of Roumanian Academy, Splaiul Independentei 202, 77208, Bucharest, Roumania

3. 3Institute “C.D. Nenitzescu” of Organic Chemistry, Romanian Academy, Splaiul Independentei 202 B, Bucharest, Roumania

4. 4Department of Organic Chemistry, “Politehnica” University Bucharest, Splaiul Independentei 313, Bucharest, Roumania

5. 5Department of Marine Sciences, Texas A & M University at Galveston, 5007 Ave. U, 77553-1675, Galveston, TX, USA

Abstract

AbstractAn interesting observation was made when studying the SNAr reaction between several 4-aryloxy-7-nitrobenzofurazans (2) and several amino acids leading to the apparition of detectable fluorescence from the substitution products3. Acidic amino acids reacted very slowly=while basic amino acids react fastest with2 having an unsubstituted phenyl or a 4-formyl-phenyl Ar group. Amongst neutral amino acids, proline reacts fastest at room temperature after 100 min. With2 having a methoxy-subtituted Ar group.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,General Chemistry

Reference29 articles.

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5. oka Evaluation of benzofurazan derivatives as fluorogenic reagents for thiols and amines using high - performance liquid chromatography;Toyo;Analyst,1989

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