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Synthesis of spirocyclopropane carboxylic acids from flavanones and their conversion to the corresponding pyridazinones

✍ Scribed by D. Litkei; V. P. Khilya; A. V. Turov; L. Siladi; S. Bokotei; Sh. Antush

Book ID
105102671
Publisher
Springer US
Year
1995
Tongue
English
Weight
525 KB
Volume
31
Category
Article
ISSN
0009-3122

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✍ Guirguis, Nadia R. ;Awad, Boshra M. ;Saad, Hanaa A. πŸ“‚ Article πŸ“… 1986 πŸ› John Wiley and Sons 🌐 English βš– 555 KB

Heterocyclic aldehydes such as 2-thiophenecarbaldehyde (1) condense with 3-aroylpropionic acids 2 or their sodium salts to give the enol lactones 3a-d of 3-aroyl-2-(2-thienylmethy-1ene)propionic acids. Isomerization of 3 ad leads to the corresponding 4-arylbenzo[b]thiophene-6-carboxylic acids 4a-d.