The 1,3-Dipolar Cycloaddition Reaction of 7,14-Dioxa-1-azadispiro[4.2.5.2]pentadec-1-ene 1-Oxide Derivatives with N-Phenylmaleimide. An Attempt to Synthesize Azasugar Analogues of Showdomycine
Abstract
7,14-Dioxa-1-azadispiro[4.2.5.2]pentadec-1-ene 1-oxide derivatives (1) undergo 1,3-dipolar cycloaddition reaction with N-phenylmaleimide (2) giving the corresponding isoxazolidines (3); attempts to convert 3 into the showdomycine azasugar analogues A and B failed.