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1,3,2-(2H)-dioxaborine polymethine dyes on the base of dehydroacetic acid — effective fluorescent amine probes

✍ Scribed by Andriy O. Gerasov; Mykola P. Shandura; Yuriy P. Kovtun; Yuriy G. Vlasenko; Vasyliy F. Gorchev

Publisher
Journal of Heterocyclic Chemistry
Year
2008
Tongue
English
Weight
375 KB
Volume
45
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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A number of new polymethine dyes based on the boron difluoride complexes of dehydroacetic acid and 3‐acetyl‐4‐hydroxypyridone has been synthesized. Their spectral‐luminescent properties have been investigated. The reaction of obtained merocyanines with primary and secondary amines has been studied. These low fluorescent dyes gave highly fluorescent open chain products, which on further heating cyclized to weakly fluorescent pyridone dyes.

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## Abstract The chiral compounds (__R__)‐ and (__S__)‐1‐benzoyl‐2,3,5,6‐tetrahydro‐3‐methyl‐2‐(1‐methylethyl)pyrimidin‐4(1__H__)‐one ((__R__)‐ and (__S__)‐**1**), derived from (__R__)‐ and (__S__)‐asparagine, respectively, were used as convenient starting materials for the preparation of the enanti