a method for making arthropodicidal oxadiazines and intermediates which are racemic or enantiomerically enriched at their chiral center , the method for making the oxadiazines comprising reaction of an intermediate selected from ## str1 ## wherein : r 1 is f , cl , or c 1 - c 3 fluoroalkoxy , r 2 is c 1 - c 3 alkyl , and r 4 is h or co 2 ch 2 . as well as certain selected intermediates including those depicted above , and methods of making them .