Palladium-catalyzed Reactions of 1,3-Dienes with Active Methylene Compounds. IV. Palladium-diphosphine Complex Catalysts
作者:Kuniyuki Takahashi、Akihisa Miyake、Go Hata
DOI:10.1246/bcsj.45.1183
日期:1972.4
Active methylene compounds, such as acetylacetone and ethyl acetoacetate, reacted with 1,3-butadiene in the presence of palladium-diphosphine complex catalysts to yield two 1 : 1 adducts, 1 and 2. Primary and secondary amines also afforded two 1 : 1 adducts, 10 and 11. Isoprene, 1,3-pentadiene, and 2,4-hexadiene also reacted with the active methylene compounds and the amines in a manner similar to
活性亚甲基化合物,例如乙酰丙酮和乙酰乙酸乙酯,在钯-二膦配合物催化剂的存在下与 1,3-丁二烯反应,产生两种 1:1 加合物,1 和 2。伯胺和仲胺也提供两种 1:1 加合物、10和11。异戊二烯、1,3-戊二烯和2,4-己二烯也以与1,3-丁二烯类似的方式与活性亚甲基化合物和胺反应。最有效和最容易获得的催化剂是 PdBr2(Ph2PCH2CH2PPh2)2 和苯酚钠的组合。