Synthesis and characterization of new (2E,2 E)-3,3 -(((3-- hydroxypropane-1,2-diyl)bis(oxy))bis(2,1-phenylene))bis(1- phenylprop-2-en-1-one) and its transformation into 2,3-bis (2- (1,3-diphenyl-4,5-dihydro-1H-pyrazol-5-yl)phenoxy)propan-1-ol

In this paper, new (2E,2 E)-3,3 -(((3-hydroxypropane-1,2-diyl)bis (oxy))bis (2,1- phenylene))bis(1-phenylprop-2-en-1-one)(2a) was prepared in good yield by condensation reaction of acetophenone with bisaldehyde(1a) in ethanolic NaOH solutions at room temperature. The (2E,2 E)-3,3 -(((3-hydroxypropane-1,2-diyl)bis- (oxy))bis(2,1-phenylene))bis(1-phenylprop-2-en-1-one) (2a) was immediately reacted with phenyl hydrazine under refluxing conditions in the presence of potassium hydroxide to obtain the corresponding 2,3-bis(2-(1,3-diphenyl-4,5-dihydro-1Hpyrazol- 5-yl)phenoxy)propan-1-ol(3a). The newly synthesized compounds confirmed by melting point and TLC and their structure were established by various analytical techniques such as IR, ^1H-NMR, ^13C-NMR and elemental analysis. Keywords: Synthesis; bischalcone; bispyrazoline; bisaldehyde.