New Methods for the Syntheses of α,β-Unsaturated Ketones, Aldehydes, and Nitriles by the Palladium-Catalyzed Reactions of Allyl β-Oxo Esters, Allyl 1-Alkenyl Carbonates, and Allyl α-Cyano Esters
Allyl β-oxo esters, allyl 1-alkenyl carbonates, and allyl α-cyano esters are converted into α,β-unsaturated ketones, aldehydes, and nitriles by palladium-catalyzed intramolecular decarboxylation-dehydrogenation. Palladium-phosphine complexes such as Pd(OAc)2-PPh3, Pd(OAc)2-dppe, or Pd2(dba)3 - CHCl3-PPh3 are effective catalysts. Yields depend on solvents and on the mole ratio of palladium to phosphine. The optimum Pd/P ratio for each substrate was determined Use of nitriles as solvents is essential for the dehydrogenation.
PALLADIUM-CATALYZED ALLYLATION OF KETONES AND ALDEHYDES WITH ALLYLIC CARBONATES VIA SILYL ENOL ETHERS UNDER NEUTRAL CONDITIONS
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1246/cl.1983.1325
日期:1983.8.5
Silyl enol ethers are converted to 2-allyl ketones and aldehydes by the reaction with allylic carbonates in the presence of a palladium-phosphine catalyst.
在钯-膦催化剂存在下,甲硅烷基烯醇醚通过与烯丙基碳酸酯反应转化为 2-烯丙基酮和醛。
SYNTHESIS OF γ,δ-UNSATURATED KETONES BY THE INTRAMOLECULAR DECARBOXYLATIVE ALLYLATION OF ALLYL β-KETO CARBOXYLATES AND ALKENYL ALLYL CARBONATES CATALYZED BY MOLYBDENUM, NICKEL,AND RHODIUM COMPLEXES
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1246/cl.1984.1721
日期:1984.10.5
Allyl β-keto carboxylates and alkenyl allyl carbonates were converted to γ,δ-unsaturated ketones by the intramolecular decarboxylative allylation catalyzed by molybdenum, nickel, and rhodium complexes.
The reactions of allylic triethylammonium bromides and dimethylsulfonium bromide with carbon nucleophiles were catalyzed by tetrakis(triphenylphosphine)palladium to afford olefinic esters and ketones.
四(三苯基膦)钯催化烯丙基三乙基溴化铵和二甲基溴化with与碳亲核试剂的反应,得到烯烃酯和酮。
Allylation of ketones via their enol acetates catalyzed by palladium-phosphine complexes and organotin compounds
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1016/s0040-4039(00)86235-8
日期:1983.1
Enol acetates are converted to allyl ketones by the reaction of allylic carbonates in the presence of palladium-phosphine complex and tin alkoxide as bimetallic catalysts.