Influence du cuivre sur la substitution des énolates stables par divers halogénures allyliques
作者:Thérèse Cuvigny、Marc Julia
DOI:10.1016/s0022-328x(00)98920-4
日期:1987.9
The allylic substitution, by a variety of allylic halides, of stable enolates derivedfrom diethyl malonate, ethyl cyanoacetate, ethyl acetoacetate and acetylacetone has been investigated. The yields and regioselectivity of these reactions are strongly influenced by cuprous ions (and their ligands).
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
Activemethylenecompounds, 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 activemethylenecompounds and the amines in a manner similar to
Alkylation of active methylene compounds by allylic alcohols using tetrakis(triphenylphosphine)palladium(0) catalysts
作者:David E. Bergbreiter、David A. Weatherford
DOI:10.1039/c39890000883
日期:——
We have found that active methylene compounds can be alkylated by allylic alcohols using (PPh3)4Pd as a catalyst at 100 °C without prior activation of the allylic hydroxy group.