M. Akssira et al., SYNTHESIS OF BRIDGED BETA-AMINO-ACIDS AND THEIR THERMOLYSIS TO DEHYDRO BETA-AMINO-ACID AND OXAURACIL, Bulletin des Societes chimiques belges, 102(4), 1993, pp. 227-232
Reactions of bridged dicarboxylic anhydride derivatives with sodium az
ide in THF give the corresponding, N-tert-butyloxycarbonyl beta-aminoe
sters 2-(a-c), which can be cyclized to oxanorborno- and norbornouraci
ls 6(a-c). Pyrolysis of these adducts leads to dehydro-beta-alanine 5
and oxauracil 7.