PART I: NOVEL QUINOXALINE DERIVATIVES OF BIOLOGICAL INTEREST

2-Substituted amino-Bi-tl-pyrazotyliquinoxalines 4-11 wereprepared by reacting 2-chloro- 3-hydrazinoquinoxaline 1 with 1,3-dicarbonyl compounds followed by treatment of the resulting 2-chloro-3-(1-pyrazolyl)quinoxlines 2,3 with the proper 2 ° amine. Reacting 1 with pyruvic acid or its ethyl ester afforded the corresponding hydrazone. Upon treating the hydrazone 15 with POCl3, the corresponding [1,2 ,4Jtriazino[4 ,3-a] quinoxallne 17 was achieved. Further, a series of 4-(piperazinyl) tetrazolojl ,5-a]quinoxalines 19-24 was prepared by reacting 1 with nitrous acid followed by treatment of the resulting 4-d,lorotetrazolo[l ,5-a]quinoxalines 18 with ]­substituted piperazlnes. Biological testing of some of the prepared compounds revealed that these compounds may have antidepressant activity and compound 4 has the most pronounced effect