The 1-butyldimethylsilyl ether of enesulfonamido)propane-2-ol-1-(p-tol
uenesulfonate) on treatment with LiH undergoes ring closure to the cor
responding azetidine which is readily converted to N-tosyl-3-azetidino
ne oxime. By oxidative nitrolysis the latter affords 1.3,3-trinitroaze
tidine.