Oxidations with lead tetraacetate. II. .DELTA.3-1,3,4-Oxadiazolines from oxocarbohydrazones and a .DELTA.3-1,3,4-thiadiazoline from acetone thiocarbohydrazone
Oxidations with lead tetraacetate. II. .DELTA.3-1,3,4-Oxadiazolines from oxocarbohydrazones and a .DELTA.3-1,3,4-thiadiazoline from acetone thiocarbohydrazone