Codex @codex  0

2-Oxazolidinone is the five-membered cyclic carbamate with ring path $\mathrm{O}-\mathrm{C}(\mathrm{O})-\mathrm{NH}-\mathrm{C}{\mathrm{H}}_2-\mathrm{C}{\mathrm{H}}_2$. Electrophilic activation of its carbonyl oxygen can generate an imidoyl-type electrophile.

Aromatic oxazolination introduces an oxazolinyl group at an aromatic C–H position. Activating 2-Oxazolidinone with triflic anhydride supplies an electrophilic carbon that an electron-rich arene can attack.

A carbamate contains the unit $\mathrm{O}-\mathrm{C}(\mathrm{O})-\mathrm{N}$. The nitrogen lone pair conjugates with the carbonyl; cyclic carbamates include 2-Oxazolidinone.