Ghosh,C. et al., Journal of the Chemical Society. Perkin transactions I, 1979, p. 1964 - 1968
作者:Ghosh,C. et al.
DOI:——
日期:——
GHOSH C.; SINHA RAY D. K.; MUKHOPADHYAY K. K., J. CHEM. SOC. PERKIN TRANS., 1979, PART 1, NO 8, 1964-1968
作者:GHOSH C.、 SINHA RAY D. K.、 MUKHOPADHYAY K. K.
DOI:——
日期:——
Synthesis of Some Novel Heteroannelated Chromones by Basic Rearrangement of 6-Methylchromone-3-Carbonitrile
作者:M. A. Ibrahim、N. M. El-Gohary、S. S. Ibrahim、S. Said
DOI:10.1007/s10593-014-1632-y
日期:2015.2
A new series of chromeno[2,3-b]pyridines was efficiently synthesized via chemical transformations of 6-methylchromone-3-carbonitrile with some methylene-active compounds bearing –CH2–CN and –CH2–CO– moieties. Some heteroannelated chromeno[2,3-b]pyridines were also synthesized. The structures of the new synthesized products were deduced on the basis of their analytical and spectral data.
5-Oxo-5H-[1]benzopyrano[2,3-b]pyridine-3-carboxylic acids 23 and their tetrazole analogues 24 were synthesized from 4-oxo-4H-1-benzopyran-3-carbonitriles 3 or 2-amino-4-oxo-4H-1-benzopyran-3-carboxaldehydes 4. When administered intravenously, they exhibited antiallergic activity in a reaginic PCA test in rats. In the carboxylic acid series, the activity was influenced by the substituents at the 2-position