Stereoselective ring closure of 6-[[(methylamino)carbonyl]oxy]-2 H -pyran-3(6 H )-ones. Formation of the 5 H -pyrano[3,2- d ]oxazole-2,6-dione ring system
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Stereoselective ring closure of 6-[[(methylamino)carbonyl]oxy]-2 H -pyran-3(6 H )-ones. Formation of the 5 H -pyrano[3,2- d ]oxazole-2,6-dione ring system