RECYCLIZATION OF CARBONYL-SUBSTITUTED 4<i>Н</i>-CHROMENES AND 1<i>Н</i>-BENZO[<i>f</i>]CHROMENES BY THE ACTION OF AMIDINES AND GUANIDINE: A NOVEL METHOD FOR THE SYNTHESIS OF <i>ortho</i>-HYDROXYBENZYLPYRIMIDINES
DOI:
https://doi.org/10.1007/3379Keywords:
amidines, 1Н-benzo[f]chromenes, 4Н-chromenes, guanidine, pyrimidines, aza-Michael reaction, cascade reactionsAbstract
A series of 2-[(pyrimidin-5-yl)methyl]phenols and 1-[(pyrimidin-5-yl)methyl]-2-naphthols have been accessed via the interaction of carbonyl-substituted 4H-chromenes and 1Н-benzo[f]chromenes with amidines and guanidine in a reaction cascade initiated by the Michael reaction. It was established that in this transformation chromenes act as the synthetic equivalents of hydroxybenzylated αformyl ketones or α-formylaldehydes.
Authors: Yulia V. Popova, Darina V. Sakhnenko, Irina V. Arbuzova, Vitaly A. Osyanin*, Dmitry V. Osipov, Yuri N. Klimochkin