Directing Effects in Substituted Pyrroles, Furans, and Thiophenes

27. Heterocycles / Directing Effects in Substituted Pyrroles, Furans, and Thiophenes / 문제 2

문제 2

In a five-membered heterocyclic compound, what is the typical position for electrophilic substitution relative to an electron-donating heteroatom?

C2 position

C3 position

C5 position

C4 position