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Treatment of 4-pentynoic acids with propargyl acetates in the presence of palladium diacetate, tri(2-furyl)phosphine and potassium carbonate in DMSO affords 5- E)- 2-allenylidene)-tetrahydro-2-furanones (Scheme 30). Employment of potassium carboxy-lates generated by the reaction of 4-pentynoic acids with KOBu-t produces lower yields. [Pg.563]

See other pages where Palladium allenylidene is mentioned: [Pg.232] [Pg.232] [Pg.212] [Pg.232] [Pg.232] [Pg.212] [Pg.231] [Pg.49] [Pg.231]

See also in sourсe #XX -- [ Pg.232 ]

See also in sourсe #XX -- [ Pg.232 ]