Methylation of 3-methyl- and 3-phenyl-4-arylhydrazonoisoxazol-5-ones with methyl iodide and dimethyl sulfate
作者:Shyam K. Singh、Lindsay A. Summers
DOI:10.1002/jhet.5570220250
日期:1985.3
Methylation of 3-methyl-4-arylhydrazonoisoxazol-5-ones with methyl iodide affords both 2,3-dimethyl-4-arylazoisoxazol-5-ones and 3-methyl-4-(N-methylarylhydrazono)isoxazol-5-ones but with dimethyl sulfate only the former products are formed. 3-Phenyl-4-arylhydrazonoisoxazol-5-ones behave in a similar way on methylation with methyl iodide and dimethyl sulfate.
Synthesis of 2H-1,2,3-triazole-4-carboxylic acids via Ru(II)-catalyzed rearrangement of 4-hydrazonoisoxazol-5-ones
作者:Dmitrii S. Vasilchenko、Anastasiya V. Agafonova、Ivan V. Simdianov、Alexander N. Koronatov、Pavel A. Sakharov、Ilya A. Romanenko、Nikolai V. Rostovskii、Alexander F. Khlebnikov、Mikhail S. Novikov
DOI:10.1016/j.tetlet.2023.154580
日期:2023.6
An atom-economy, two-step synthesis of 2H-1,2,3-triazole-4-carboxylic acids from 3-arylisoxazol-5(4H)-ones and arenediazonium tetrafluoroborates is described. The formation of the 1,2,3-triazole ring is achieved by the [Ru(p-cymene)Cl2]2-catalyzed rearrangement of 4-hydrazonoisoxazol-5-ones which are resulted from the diazo coupling. The advantages of the method include the available starting compounds
描述了从 3-芳基异恶唑-5(4 H )-酮和芳烃重氮四氟硼酸盐两步原子经济合成 2 H -1,2,3-三唑-4-羧酸。1,2,3-三唑环的形成是通过重氮偶联产生的4-亚肼基异恶唑-5-酮的[Ru( p-伞花烃)Cl 2 ] 2催化重排来实现的。该方法的优点包括可用的起始化合物以及无需使用色谱法即可纯化目标酸的能力。
Reactivity of unsaturated centres in heterocycles and chalkones toward diazoalkanes
作者:A. Mustafa、W. Asker、A.H. Harhash、A.M. Fleifel
DOI:10.1016/s0040-4020(01)93877-3
日期:1965.1
Singh, Shyam K.; Summers, Lindsay A., Journal of Heterocyclic Chemistry, 1987, vol. 24, p. 933 - 939