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Ring closure reactionsRing closure reactions O 0130 Synthesis and Biological Evaluation of Pyrido[1,2-a]pyrimidine and Isoxazoline Derivatives. -Pyrido[1,2-a]pyrimidines (VI) and isoxazoline derivatives (VII) are synthesized by condensation of different arylidenes (IV) with 2-aminopyridine (V) and hydroxylamine, respectively. All compounds are screened for their antimicrobial activity. -(MERJA, B. C.; JOSHI, A. M.; PARIKH, K. A.; PARIKH*, A. R.; Indian J. Chem., Sect. B: Org. Chem. Incl. Med. Chem. 43 (2004) 4, 909-912; Dep. Chem., Saurashtra Univ., Rajkot 360 005, India; Eng.) -H. Haber 33-042

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