期刊
CHEMISTRYSELECT
卷 6, 期 3, 页码 279-305出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202003436
关键词
Pyrazoles; bipyrazoles; cycloaddition; cyclocondensation; difunctional compounds
This article thoroughly reports the synthetic routes to six differently connected bipyrazole systems, with a focus on cyclocondensation reactions and 1,3-dipolar cycloaddition reactions. Many of these bipyrazoles have potential applications in pharmaceutical and material science fields.
The synthetic routes to six differently connected bipyrazole systems 1,1 '-, 1,3 '- and 1,4 '-, 3,3 '-, 3,4 '- and 4,4 '-bipyrazoles are thoroughly reported. Two main synthetic platforms are outlined; i) cyclocondensation reactions of tetraketones or pyrazoles having difunctional moieties with hydrazines, or pyrazolyl-hydrazines with difunctional substrates, ii) 1,3-dipolar cycloaddition of nitrilimines with bis-olefines, or bis-nitrilimines with activated alkenes and alkynes. Many of the reported bipyrazoles have potent applications; in pharmaceutical and material science areas.
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