Preparation of γ-Heterosubstituted Allylindium and Diindium Reagents and Their Reactions with Carbonyl Compounds
摘要:
Various gamma-heteroatom-substituted allylindium reagents were prepared, and their reactions with carbonyl compounds were examined. The reaction of 1,3-dibromopropene with metallic indium gave two types of organoindium species, gamma-bromoallylindium and allylic diindium reagents. While the former gave 2-phenyl-3-vinyloxirane upon the coupling with benzaldehyde, the latter gave 1-phenylbut-3-en-1-o1. 1-Iodo-3-bromopropene gave the homoallylic alcohol exclusively. gamma-Alkoxyallylindium reagents were prepared by treating the corresponding gamma-alkoxyallyllithium with indium trichloride and reacted with benzaldehyde to give vic-diol mono ethers in high yields with good syn selectivity. gamma-(Trimethylsilyl)allylindium and alpha,gamma-disubstituted allylindium reagents were also prepared via transmetalation with the corresponding allyllithium.
“Palladium complexes-KF / alumina” catalysed exchange of allylic groups of esters with phenol
作者:J. Muzart、J.-P. Genêt、A. Denis
DOI:10.1016/0022-328x(87)80136-5
日期:1987.5
In the presence of KF / alumina and catalytic amounts of palladium complexes, phenol reacts with allylic esters under mild conditions to give the corresponding allyl phenyl ethers.
在KF /氧化铝和催化量的钯配合物存在下,苯酚在温和条件下与烯丙基酯反应,生成相应的烯丙基苯基醚。
Process for the preparation of 1,4-disubstituted 2-butenes
申请人:Eastman Kodak Company
公开号:US05189199A1
公开(公告)日:1993-02-23
A process is disclosed for the preparation of 1,4-dioxy-2-butenes by reacting 3,4-epoxy-1-butene with an oxygen nucleophile in the presence of a Pd(O) complex catalyst.