The Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: April 25, 2025
Methods for regioselective ring-opening reactions of N-sulfonyl-protected aziridyl alcohols with azole nucleophiles have been developed. Several classes azoles, including indazole, substituted pyrazole, benzotriazole, and tetrazole, employed as reaction partners, giving rise to C3-selective opening >3:1 N-selectivity. BF3•OEt2 is the optimal catalyst most substrate combinations, although examples where diphenylborinic acid (Ph2BOH) provides higher yields, or proceed efficiently without a catalyst, are also described. Computational modeling BF3•OEt2-catalyzed consistent observed regiochemical outcome. The calculated transition state appears be stabilized by an unconventional OH···FB hydrogen-bonding interaction.
Language: Английский