HELVETICA CHIMICA ACTA, cilt.96, sa.7, ss.1339-1347, 2013 (SCI-Expanded)
The [3,3(4H,4H)-bi-2H-1,3-oxazine]-4,4-diones 3a-3i were obtained by [2+4] cycloaddition reactions of furan-2,3-diones 1a-1c with aromatic aldazines 2a-2d (Scheme1). So, new derivatives of bi-2H-1,3-oxazines and their hydrolysis products, 3,5-diaryl-1H-pyrazoles 4a-4c (Scheme3), which are potential biologically active compounds, were synthesized for the first time.