Utilization of Basic Alumina in a One-Pot Synthesis of 1,4-Diketones, 1,4,7-Triketones, and Dihydrojasmone by Conjugate Addition of Nitroalkanes to Enones
The one-pot synthesis of functionalized 1,4-diketones was achieved in good yields by conjugate addition of primary nitroalkanes to α,β-unsaturated carbonyl compounds on basic alumina without solvent, followed by in situ oxidation with 30% aqueous hydrogen peroxide in methanol. The one-pot syntheses of 1,4,7-triketones and dihydrojasmone are also reported.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0685517A1
公开(公告)日:1995-12-06
A composition containing a linear alternating polymer of carbon monoxide and at least one olefinically unsaturated hydrocarbon, and further a stabilizing agent which is a ring assembled organic hydrocarbon, shaped articles containing such composition and process for preparing such compositions.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0714938A2
公开(公告)日:1996-06-05
The thermal oxidative stability of polyketone polymers is improved by combining a major amount of linear alternating polyketone polymer and a minor amount of a primary antioxidant, a secondary antioxidant, and a scavenger.