Stereoselective Synthesis and Antiviral Activity of (1E,2Z,3E)‐1‐(Piperidin‐1‐yl)‐1‐(arylhydrazono)‐2‐[(benzoyl/benzothiazol‐ 2‐oyl)hydrazono]‐4‐(aryl1)but‐3‐enes |
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Authors: | Hatem A. Abdel‐Aziza Bakr F. Abdel‐Wahab Farid A. Badria |
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Affiliation: | 1. Applied Organic Chemistry Department, National Research Centre, Dokki, Cairo, Egypt;2. Department of Pharmacognosy, Faculty of Pharmacy, University of Mansoura, Mansoura, Egypt |
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Abstract: | The reaction of benzoyl hydrazine 1a or benzothiazole‐2‐carbohydrazide 1b with 2‐oxo‐N‐arylpropanehydrazonoyl chlorides 2a–d yielded (1Z,2E)‐2‐[(benzoyl/benzothiazol‐2‐oyl)hydrazono]‐N‐(aryl)propanehydrazonoyl chlorides 3a–e . The reaction of 3a–c with sodium benzenesulphinate furnished sulphones 5a–c while the reaction of 5d , e with hydroxyl amine afforded hydroxomoyl derivatives 6a , b . The one‐pot sterioselective reaction of N‐(aryl)propanehydrazonoyl chlorides 3 with certain aromatic aldehydes in the presence of piperidine resulted in the formation of (1E,2Z,3E)‐1‐(piperidin‐1‐yl)‐1‐(arylhydrazono)‐2‐[(benzoyl/benzothiazol‐2‐oyl)hydrazono]‐4‐(aryl1)‐but‐3‐enes 7a–g . X‐ray analysis of piperidinyl amidrazone 7g showed a conversion of its geometrical structure with respect to that of compound 3 and confirmed the stereoselectivity of the latter reaction. The piperidinyl amidrazones 7a–g possessed a significant antiviral activity against herpes simplex viruses (HSV‐1). Compound 7d reduced the number of viral plaques of herpes simplex type‐1 (HSV‐1) by 67%, with respect to the effect of reference drug Aphidicolin. |
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Keywords: | Antiviral activity Benzothiazole HSV‐1 Hydrazones X‐ray crystallography |
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