ISSN:
0170-2041
Keywords:
Furo[3,4-b]pyrans
;
Difuro[3,4-b:3′,4′-e]pyridine
;
β-Tetronic acid
;
Malononitriles, arylmethylene-
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A simple one-step synthesis of 2-amino-4-aryl-5-oxo-4H-furo[3,4-b]pyran-3-carbonitriles 7 is described. It involves reaction of 2,4(3H,5H)-furandione (β-tetronic acid) (5) with arylmethylenemalononitriles 4 in basic medium. Some substituent effects are noted and the assignments of 13C-NMR spectra are discussed. Ring transformation of the furo[3,4-b]pyran 7a leads to the difuro[3,4-b:3′,4′-e]pyridine 9.
Additional Material:
3 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jlac.1991199101140
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