Sequential Formal (4 + 1)-Spirocycloaddition/Oxidative Cleavage between Indoles and β‑Nitrostyrenes: One-Pot Route to Benzamide-Containing (3),4,5-Substituted Isoxazoles

吲哚与β-硝基苯乙烯的顺序形式(4+1)螺环加成/氧化裂解：一锅法合成含苯甲酰胺的(3),4,5-取代异噁唑