A copper-catalyzed tandem carboarylation/cyclization of alkynyl phosphonates with diaryliodoniumsalts is reported. The reaction gives straightforward access to valuable cyclic enol phosphonates in good yields under mild conditions. This transformation entails an initial chemoselective arylation of the alkyne followed by an intramolecular trapping of an intermediate vinyl cation by the phosphoryl group
Electrochemical selenium–π–acid promoted hydration of alkynyl phosphonates
作者:Bo Li、Yunhao Zhou、Yanan Sun、Feng Xiong、Linghui Gu、Wenbo Ma、Ruhuai Mei
DOI:10.1039/d2cc01901a
日期:——
Unprecedented electrochemical selenium–π–acid promoted hydration of alkynes bearing a phosphonate auxiliary was described. Thus, valuable (hetero)aryl and alkyl ketones could be accessed under mild, metal- and external oxidant-free conditions.