Regioselective Synthesis of 5-Trifluoromethyl 1,2,4-Triazoles via [3 + 2]-Cycloaddition of Nitrile Imines with CF3CN
作者:Bo Lin、Zipeng Zhang、Yunfei Yao、Yi You、Zhiqiang Weng
DOI:10.3390/molecules27196568
日期:——
approach to 5-trifluoromethyl 1,2,4-triazoles via the [3 + 2]-cycloaddition of nitrile imines generated in situ from hydrazonyl chloride with CF3CN, utilizing 2,2,2-trifluoroacetaldehyde O-(aryl)oxime as the precursor of trifluoroacetonitrile. Various functional groups, including alkyl-substituted hydrazonyl chloride, were tolerated during cycloaddition. Furthermore, the gram-scale synthesis and common downstream
我们在此描述了一种通过使用 2,2,2-三氟乙醛O -由 CF 3 CN原位生成的腈亚胺与 CF 3 CN 进行 [3 + 2]-环加成来制备 5-三氟甲基 1,2,4-三唑的一般方法。 (芳基)肟作为三氟乙腈的前体。各种官能团,包括烷基取代的肼基氯,在环加成过程中是可以接受的。此外,克级合成和常见的下游转化证明了这种开发方法的潜在合成相关性。