期刊
TETRAHEDRON
卷 58, 期 11, 页码 2201-2209出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(02)00092-3
关键词
benzoxazoles; pyridylbenzoxazol-5-yl-L-alanine; Mitsunobu reaction; fluorescence
The syntheses of N-(tert-butyloxycarbonyl)-3-[2-(4-pyridyl)benzoxazol-5-yl]-L-alanine methyl ester and N-(tert-butyloxycarbonyl)-3-[2-(2-pyridyl)benzoxazol-5-yl]-L-alanine methyl ester using different oxidizing agents (NBS, lead tetraacetate, Mitsunobu reaction) in oxidative cyclization of Schiff base are described. The compounds obtained are fluorescent. The position of the emission band and the fluorescence quantum yield depend on solvent polarity. The fluorescence decays of all the compounds studied are heterogeneous. (C) 2002 Elsevier Science Ltd. All rights reserved.
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