Palladium(II)-Catalyzed Synthesis of 2<i>H</i>,3′<i>H</i>-Spiro[benzofuran-3,2′-naphthoquinones]
作者:Pieter Claes、Jan Jacobs、Bart Kesteleyn、Tuyen Nguyen Van、Norbert De Kimpe
DOI:10.1021/jo400852z
日期:2013.9.6
skeleton, were synthesized starting from 2-aryloxymethyl-1,4-naphthoquinones by means of a palladium(II)-catalyzedreaction, which is a new spirocyclic transformation. Under optimal conditions, i.e. 10 mol % of palladium(II) acetate, 15 mol % of 3,5-dichloropyridine, and 5 mol % of trifluoroacetic acid in aceticacid at 110 °C, various 2H,3′H-spiro[benzofuran-3,2′-naphthoquinones] were synthesized in yields