-
tert-butyl 3-(fluoromethyl)azetidine-1-carboxylate
-
tert-butyl 3-(cyanomethylene)azetidine-1-carboxylate
-
tert-butyl 3-(bromomethyl)-3-fluoroazetidine-1-carboxylate
-
tert-butyl 3-((methylsulfonyl)oxy)azetidine-1-carboxylate
-
tert-butyl 2-oxo-6-azaspiro[3.4]octane-6-carboxylate
-
tert-butyl (3-oxocyclobutyl)carbamate