SYNTHESIS AND FUNGICIDAL ACTIVITY OF SUBSTITUTED TETRAHYDROPYRIDO[3,4-C]COUMARINS AND BENZO[H]TETRAHYDROPYRIDO[3,4-C]COUMARINS

Condensation of aromatic aldehydes with 2,6-diphenyl-3-carboethoxy-4-piperidone and ammonium acetate gave rise to a number of substituted tetrahydropyrido [3,4-c] coumarines. Their methylation and acetylation were investigated. The way hydrazine hydrate affected the compounds in question was also reported. The resultants were tested for fungicidal properties.