87: 167955y Improved procedure for the preparation of "oxauracil", 2H-1,3-
(3H)-oxazine-2,6-dione. MacMillan, John H. (Dept. Chem., Temple Univ.,
Philadelphia, Pa.). Org. Prep Proceed. Int. 1977, 9(2), 87-9 (Eng).
The title compd 1 was prepd. in 78% total yield by treating maleic
anhydride with Me3SiN3 at 55-60 degrees to give trimethylsilyl derivative
11 which was treated with EtOH.
Chem. Abstr. Vol. 87, 167955.