1,3-Dipolar Cycloadditions of Azidoalkylphosphonates to Enamines. Systhesis of D2-1,2,3-triazolines and Triazoles
摘要:
5-Amino-Delta 2-1,2,3-triazolines (3) and 1,2,3-triazoles (4) and (8) derived from aminoalkylphosphonates have been obtained in a regioselective fashion, by treating diethyl azidoalkylphosphonates (1) with enamines (2) and (6). Reaction of azidomethylphosphonate (1) with an excess of norbornadiene yields triazoline (10). This monoadduct undergoes nitrogen evolution and retro Diels-Alder reaction to give aziridine (11) and triazole (12), respectively.
1,3-Dipolar Cycloadditions of Azidoalkylphosphonates to Enamines. Systhesis of D2-1,2,3-triazolines and Triazoles
摘要:
5-Amino-Delta 2-1,2,3-triazolines (3) and 1,2,3-triazoles (4) and (8) derived from aminoalkylphosphonates have been obtained in a regioselective fashion, by treating diethyl azidoalkylphosphonates (1) with enamines (2) and (6). Reaction of azidomethylphosphonate (1) with an excess of norbornadiene yields triazoline (10). This monoadduct undergoes nitrogen evolution and retro Diels-Alder reaction to give aziridine (11) and triazole (12), respectively.