A new, practical, synthesis of β-ketophosphonates relying on the conversion of the organolithium reagentfrom a dialkyl methylphosphonate into the correspondingorganocopperreagent, and its reaction with acylchlorides is described. The structure of the intermediate organocopperreagents is discussed.
Copper-Catalyzed Microwave-Expedited Oxyphosphorylation of Alkynes with Diethyl Phosphite and <i>t</i>-Butyl Hydroperoxide Synthesis of Densely Functionalized Phosphonylated Indenones
作者:Pablo Macías-Benítez、Alfonso Sierra-Padilla、Manuel J. Tenorio、F. Javier Moreno-Dorado、Francisco M. Guerra
DOI:10.1021/acs.joc.1c01763
日期:2021.12.3
Treatment of alkynes with diethylphosphite and t-butyl hydroperoxide in the presence of [Cu(MeCN)4]BF4 under microwave irradiation produced the oxyphosphorylation of the triple bond, giving rise to the corresponding β-ketophosphonates in moderate-to-good yields. When the triple bond was conjugated to a carbonyl group bearing an aromatic ring, it led to the cyclization of the resulting ketone intermediate