The Acid Catalyzed Decomposition of Diazo Compounds. I. Synthesis of Oxazoles in the BF<sub>3</sub>Catalyzed Reaction of Diazo Carbonyl Compounds with Nitriles
作者:Toshikazu Ibata、Ryohei Sato
DOI:10.1246/bcsj.52.3597
日期:1979.12
The BF3-catalyzed decomposition of diazo carbonyl compounds in nitriles have afforded the corresponding oxazoles in high yields. This method is applicable to diazo carbonyl compounds such as m- and p-substituted diazoacetophenones, ethyl diazoacetate, 1,2-diphenyl-2-diazoethanone, dibenzoyldiazomethane, and dimethyl diazomalonate. Bis(diazo ketone)s such as terminal bis(diazoacetylated) alkanes (III1−4:
BF3 催化的腈中重氮羰基化合物的分解以高产率提供了相应的恶唑。该方法适用于间位和对位取代的重氮苯乙酮、重氮乙酸乙酯、1,2-二苯基-2-重氮乙酮、二苯甲酰重氮甲烷和重氮丙二酸二甲酯等重氮羰基化合物。双(重氮酮)如末端双(重氮乙酰化)烷烃(III1-4:n=6, 8, 10, 12)和间和对双(重氮乙酰基)苯也在类似的反应中得到相应的双恶唑。该反应被解释为通过甜菜碱中间体的逐步机制,由 BF3 对重氮羰基化合物的羰基氧的攻击引发。描述了恶唑的发射光谱。