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200517.fm Page 139 Friday, March 18, 2005 2:52 PM
2005
Isoxazole derivatives
R 0240
Synthesis and Biological Activity Evaluation Studies on Novel Isoxazolidines. —
[2 + 3] cycloaddition reaction of α,N-diarylnitrones (I), separately with allyl ace17- 126 The
tate (II) gives the novel isoxazolidines (III) in a highly stereoselective fashion leading
to the formation of only one diastereomer. The racemic products are enantiomerically
enriched by lipase-catalyzed deacetylation. For these reactions individual e.e.-values
are not given. (III) show antioxidant rather than antitubercular activity. —
(PARMAR*, V. S.; et al.; Indian J. Chem., Sect. B: Org. Chem. Incl. Med. Chem. 43
(2004) 12, 2670-2682; Dep. Chem., Univ. Delhi, Delhi 110 007, India; Eng.) —
H. Haber
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