ent to form ,a 6-azauracil ether of the compound wherein R is the same as above and R is a lower alkyl, in Step B treating said 6-azauracil ether with a compound of the formula wherein R and R are the same as above and R is chlorine or bromine to obtain the compound thereby producing a compound having the formula wherein R, R and R are the same as above and in Step B solvolizing this compound to