2026-05-15T21:48:03Z https://www.eurjchem.com/index.php/eurjchem/oai

oai:ojs.www.eurjchem.com:article/1039 2014-12-31T04:47:25Z eurjchem:ART driver

Study on regioselective synthesis of bioactive bis-spiropyrazolines using molecular orbital calculations Farghaly, Thoraya Abd El-Reheem Abbas, Ikhlass Mohamed Hassan, Walid Mohamed Ibrahim Lotfy, Mai Samir Nitrilimine Regioselectivity Bis-spiropyrazole Antimicrobial activity Molecular orbital calculations 1 3-Dipolar cycloaddition reaction 1,3-Dipolar cycloaddition reaction of (2E,2'E)-2,2'-(1,4-phenylene bis(methanylylidene)) bis(3,4-dihydronaphthalen-1(2H)-one) (3) and 2,2'-(1,4-phenylene bis(methanylylidene)) bis(1H-indene-1,3(2H)-dione) (8) with a variety of nitrilimines, generated in situ by triethylamine dehydrohalogenation of the corresponding hydrazonoyl halides, (4) proceeded region-selectively and affording novel spiropyrazoline derivatives 5 and 10, respectively. The mechanisms of the reactions studied are discussed and the structures of the products were confirmed by spectral data and elemental analyses. Also, molecular orbital plots for HOMO and LUMO verify our suggested mechanism and stereo-selectivity of the reaction. The antimicrobial activity of the products was evaluated and promising results were obtained.  Atlanta Publishing House LLC 2014-12-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/1039 10.5155/eurjchem.5.4.577-583.1039 European Journal of Chemistry; Vol. 5 No. 4 (2014): December 2014; 577-583 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/1039/pdf_1039