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Activation and Substitution of 1‑Ferrocenylalkylamines with Allenones: Application to Three-Component Synthesis of 4‑(1-Ferrocenyl­alkyl)­pyrazoles

By Zhixiong Chen (3115491), Lu Han (151620) and Shi-Kai Tian (1398094)


A one-pot, two-step three-component synthesis of 4-(1-ferrocenylalkyl)­pyrazoles has been developed involving activation and substitution of 1-ferrocenylalkylamines with allenones under mild conditions. A range of 1-ferrocenylalkylamines reacted with allenones in the presence of dipicolinic acid at room temperature without extrusion of air and moisture, and the resulting crude products were treated with hydrazine to afford structurally diverse 4-(1-ferrocenylalkyl)­pyrazoles in moderate to good yields. Moreover, the three-component reaction was successfully extended to an enantioenriched α-ferrocenylbenzylamine with complete retention of configuration

Topics: Medicine, Ecology, Immunology, Infectious Diseases, Plant Biology, Computational Biology, Environmental Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, presence, Application, acid, retention, Three-Component, Ferrocenylalkylamine, Activation, moisture, Substitution, crude, synthesis, activation, Allenone, 1- ferrocenylalkylamines, substitution, configuration, dipicolinic, three-component, extrusion, hydrazine, enantioenriched α- ferrocenylbenzylamine, yield, allenone, Ferrocenyl, one-pot, Synthesi
Year: 2017
DOI identifier: 10.1021/acs.orglett.7b02830.s002
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