A Simple and Efficient Enantioselective Synthesis of 2-Alkylidene-3-alkyl-1,4-benzodioxanes by Palladium-Catalyzed Annulation of Benzene-1,2-diol and Propargylic Carbonates
作者:Jean-Robert Labrosse、Paul Lhoste、Denis Sinou
DOI:10.1021/ol9913791
日期:2000.2.1
[GRAPHICS]Benzene-1,2 diol reacts with various propargylic carbonates in the presence of a palladium catalyst and a chiral atropoisomeric diphosphine to give 2 alkylidene 3-alkyl-1,4-benzodioxanes in good yields and 56-97% enantiomeric excess.