Synthesis of novel 4H-furo[3,2-c]pyran-4-ones and 4H-furo[3,2-c]chromen-4-ones
作者:Yu. O. Gorbunov、V. S. Mityanov、V. G. Melekhina、M. M. Krayushkin
DOI:10.1007/s11172-018-2074-y
日期:2018.2
It was found that the condensation of two equivalents of 4-hydroxy-6-methyl-2H-pyran-2-one or 4-hydroxycoumarin with arylglyoxals in boiling formic acid leads to 4H-furo[3,2-c]-pyran-4-ones or 4H-furo[3,2-c]chromen-4-ones, respectively.