A Combination of Copper(0) Powder and Selectfluor Enables Generation of Cationic Copper Species for Mild 1,2-Dicarbonylation of Alkynes
摘要:
A combination of copper powder and Selectfluor permits the generation of cationic copper species that efficiently catalyze 1,2-dicarbonylation of alkynes under mild conditions with water and dioxygen as inexpensive and environmentally benign sources of oxygen.
Cu(OAc)2 catalyzed ultrasound assisted rapid synthesis of isocoumarin derivatives bearing 3-oxobutyl moiety at C-4 position
作者:Sidda Ramarao、Mohanreddy Pothireddy、Rapolu Venkateshwarlu、Krishna Murthy VR. Moturu、Vidavalur Siddaiah、Rambabu Dandela、Manojit Pal
DOI:10.1016/j.molstruc.2022.132418
日期:2022.4
A rapid synthesis of isocoumarins has been achieved via the Cu-catalysed cascade reaction involving tandem intramolecular cyclization followed by olefin addition under ultrasound irradiation. The methodology involved one-pot reaction of 2-alkynylbenzoate esters with methyl vinyl ketone in the presence of Cu(OAc)2 in aqueous DMF to afford a range of isocoumarin derivatives bearing 3-oxobutyl moiety
A gold(I)-catalyzed oxidative diketonization of alkynes by water in the presence of Selectfluor has been achieved. The application of the present protocol for the one-pot synthesis of quinoxaline derivatives from alkynes and o-phenylenediamines has also been successful.