Process for the preparation of derivatives oxazoline azetidinone

THE INVENTION IS ON A METHOD OF PREPARATION OF DERIVATIVES OF FORMULA OXAZOLINE-azetidinone: (CF DRAWING IN BOPI) WHERE R IS AN ATOM HYDROGEN, AN ALKYL GROUPS OR aLKENYL, aRALKYL POSSIBLY sUBSTITUTED aRYL sUBSTITUTED OR MAY POSSIBLY sUBSTITUTED aryloxymethyl, R IS A GROUP CARBOXYL FREE OR PROTECTED AND R IS AN ATOM HYDROGEN OR mETHOXY GROUPS CHARACTERIZED IN THAT YOU SUBMIT DERIVATIVE FORMULA PENICILLIN (2): (CF DRAWING IN BOPI)