Mar-Apr 1993 Reactions of Amidoximes with Orthoacetates Girts Kaugars* and William Watt Upjohn Laboratories, The Upjohn Company, Kalamazoo, Michigan 49001 Received June 26, 1992 The reaction of two amidoximes 4 with ethyl orthoacetate in the presence of an acid catalyst gave triazine Af-oxides 7. A mechanism via a Beckmann rearrangement to a carbodiimide, followed by reaction with amidoxime and the ortho ester, is proposed. 497 ...