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Derivatives of 2-oxo-3(2H)-benzothiazolineacetonitrile and related compounds. I. Synthesis of N-hydroxy-2-oxo or thioxo-3(2H)-benzothiazolineethanimidamide and related products

✍ Scribed by John J. D'Amico; John T. Marvel; Frederic G. Bollinger

Book ID
112129047
Publisher
Journal of Heterocyclic Chemistry
Year
1988
Tongue
English
Weight
199 KB
Volume
25
Category
Article
ISSN
0022-152X

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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