Synthetic analogs of natural flavolignans. XII. Synthesis of 3,5-diarylsubstituted pyrazolines based on 1,3-benzodioxane and 1,4-benzodioxane chalcone analogs
In dependence on endurance, the reaction of chalcones with thiosemicarbazide resulted in chalcone or flavanone thiosemicarbazones, whose structures were proven by H-1 NMR.