A. Balaiah

Synthesis of Some Fused Pyrazoles and Isoxazoles

The α-keto methylene group in 3,5-diaryl-2-cyclohexenones 2 and 3,5-diarylcyclohexanones 8 have been used to obtain fused pyrazoles and isoxazoles. The new compounds were characterized by IR and 1H-NMR spectral data.

CYCLOHEXENONE CARBOXYLATES. A VERSATILE SOURCE FOR FUSED ISOXAZOLES AND PYRAZOLES

The 6-carbethoxy-3,5-diarylcyclohex-2-enone (1) was subjected to condensation and 1,3-dipolar cycloaddition reactions to get fused isoxazole and pyrazole derivatives.

Cyclohexanones-source for selena/thiadiazoles and diazaphospholes

Some new heterocyclic compounds containing selenadiazole, thiadiazole and diazaphosphole fused to cyclohexanones have been prepared and characterized by spectral data.

1,5-Diphenyl-3,3-dicyano-1,5-pentanedione: A Synthon for Novel Heterocycles

1,5-Diphenyl-3,3-dicyano-1,5-pentanedione has been used to incorporate N, O, S to obtain 1,4-dihydropyridine, 4 H -pyran, and 4 H -thiopyran, which in turn serve as precursors for the synthesis of novel spiro heterocycles. All the compounds were characterized by IR and NMR spectral data.

A NEW CLASS OF FUSED BIS [1,2,3] SELENA AND/OR THIADIAZOLES

A novel class of bis selena and/or thiadiazoles were prepared by the reaction of semicarbazones of 3,6-dithiaoctahydrophenanthrene- 1,8-dione, 3,6-dithiaoctahydroanthracene-1,8-dione and 3,7-dithiaoctahydroanthracene-1,5-dione with SeO2 and SOCl2, respectively. The latter, in turn, were obtained from 1,2-, 1,3- and 1,4-xylylenedimercaptoacetic acids.

PHENACYL E-STYRYL SULFONES: A POTENTIAL SOURCE FOR BIFUNCTIONAL HETEROCYCLIC SULFONES

Abstract The bifunctional heterocyclic sulfones containing selenadiazoles/thiadiazoles and pyrazolines/isoxazolines have been prepared from phenacyl E-styryl sulfones.