Synthesis and Photophysical Properties of 1,4-Dihydro-2 H,5H-chromeno[4,3-D][1,3]oxazin-5-ones, and Derivatives Containing Tethered 1,2,3-Triazoles, from 4-Aminocoumarins

Article abstract of DOI:10.1055/s-0037-1612428

A facile protocol for the unprecedented one-pot H ₂ SO ₄ -mediated hydroxymethylation/cyclative N, O -acetalization of 4-aminocoumarins to 1,4-dihydro-2 H,5 H -chromeno[4,3- d ][1,3]oxazin-5-ones, in moderate to good yields, was deve