Synthesis and Structural Studies of Isomeric D Δ²-pyrazolines

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Synthesis and Structural Studies of Isomeric D Δ²-pyrazolines

A. V. Ingle^¹, A. G. Doshi^² and A. W. Raut^³

^¹Department of Chemistry, Yeshwantrao Chavan College of Arts, Commerce and Science Sillod, Dist. Aurangabad- 431112 India. ^²Vidya Bharati Mahavidyalaya, Amravati- 444602 India. ³P. G. Department of Chemistry, Shri Shivaji Science College, Amravati - 444 603 India.

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ABSTRACT:

1-(2’-Thienyl)-3-(4’’-dimethylamino phenyl)-2-propen-1-one(Ia-e) react with hydrazine hydrochloride in DMF medium to give isomeric 1-H pyrazolines (IIa-e), react with phenyl hydrazine hydrochloride in DMF medium to give isomeric 1-phenyl pyrazolines (IIIa-e),react with 2,4-dinitro phenyl hydrazine hydrochloride in DMF medium to give isomeric 1-(2,4-dinitro phenyl) pyrazolines (IVa-e) and also react with semicarbazide hydrochloride in DMF medium to give isomeric 1-carboxamido pyrazolines (Va-e). Characterization and structural elucidation were done on the basis of melting point determination, analytical and spectral studies.

KEYWORDS:

Isomeric D²-pyrazolines; synthesis; structural study