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Synthesis, acid-base and spectral properties of 3-(benzoimidazol-2-yl)-2-phenylimino-2H-chromenes

✍ Scribed by A. A. Karasev; L. L. Lukatskaya; M. I. Rubtsov; Z. A. Sizova; A. O. Doroshenko

Book ID
110409550
Publisher
Springer
Year
2002
Tongue
English
Weight
274 KB
Volume
51
Category
Article
ISSN
1573-9171

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## Abstract The key 3-(2-oxo-2H-chromen-3-yl)-2-oxo-2H,5H-pyrano[3,2-c]chromen-5-yl acetates 3 were synthesized in high yields by cyclocondensation of 4-oxo-4H-chromen-3-carbaldehydes 1 with coumarin-3-acetic acids 2 under mild conditions. The reaction pathway involves aldol condensation and subseq