Condensation of the Ethyl Ester of 4,6-Dimethyl-2-OXO-2H-Pyran-5-Carboxylic Acid With Aromatic Aldehydes

References

• Anghelova , Y. , Ivanov , C. and Metsov , S. 1977 . Chem. Ber. , 110 : 1594
   Google Scholar
• Anghelova , Y. , Spirova , S. and Ivanov , C. 1977 . Synthesis , 313
   Google Scholar
• Ivanov , C. , Anghelova , Y. and Spirova , S. 1979 . ibid. , 732
   Google Scholar
• Turner , W. and Pirkle , W. 1974 . J. Org. Chem. , 39 : 1935
   Web of Science ®Google Scholar
• Sardella , D. , Holak , T. and Vogel , G. 1975 . Org. Magn. Reson. , 7 : 355
   Google Scholar
• The reported yield of 3 (based on 1) are of pure recrystallized products
   Google Scholar
• With decomposition
   Google Scholar
• The microanalyses were in satisfactory agreement with calculated values: C± 0.18%, H± 0.26%, N± 0.20%, S± 0.12% exeption 3i C - 0.50%.
   Google Scholar
• I. R. were recorded on a Specord 71-IR-spectrophotometer, nujol: 1725–1740 (C[dbnd]O, lactone), 1670–1700 (COOH), 1610–1630 (C[dbnd]C) cm−1.
   Google Scholar