Studies on antifungal agents. 20. Effect of the nitrogen substitution on the in vitro activity of novel 3,5-substituted isoxazolidines.

The effect of the nitrogen substitution on the in vitro antifungal activity of a series of novel cis-3,5-substituted isoxazolidine derivatives is investigated. The 2-(N-methyl) analogues 4-6 were found to be the most active compounds when tested in vitro against Trichophyton rubrum, Aspergillus fumigatus and Candida albicans, with MIC values ranging between 0.7 and 70 micrograms/ml.