1. 1-Phenyl-3,3,4-trialkyl-1,2,4-triazolidin-5-onesviacyeloisomerization of ketone 4-alkyl-2-phenylsemicarbazones
2. 5-Substituted-3-(substituted)phenyl-1,3,4-oxadiazolin-2(3H)-ones. Synthesis and reactions with nucleophilic reagents
3. All compounds were analyzed for C, H, and N. The results obtained were within ± 0.4% of the calculated values
4. Eluent (by volume): Hexane 66., ethyl acetate 30., tetrahydrofuran 4
5. Eluent (by volume): Hexane 80., ethyl acetate 16., tetrahydrofuran 4