Abstract
A series of some fused and spiro heterocyclic compounds such as pyrazolines, isoxazolines, pyrimidines, β-lactams, and thiazolidinone derivatives incorporating compounds 3, 6a-d, 7a-d, 9a-c, 10a-c, 11a-c, 12a-c, and 13a-c have been synthesized by a cycloaddition and cyclocondensation reaction of monochloroacetyl chloride, mercaptoacetic acid, hydrazines, hydroxylamine, urea, and thiourea with the prepared 5a-d and 8a-c.