Oxidative Coupling of Benzenes with α,β-Unsaturated Aldehydes by the Pd(OAc)2/Molybdovanadophosphoric Acid/O2 System
摘要:
The oxidative coupling reaction of benzene with an (x,P-unsaturated aldehyde was examined by the combined catalytic system of Pd(OAc)(2) with molybdovanadophosphoric acid (HPMoV) under atmospheric dioxygen. Thus, the reaction of benzene with acrolein under dioxygen (1 atm) by the use of catalytic amounts of Pd(OAc)(2) and H4PMo11VO40 (.) 26H(2)O in the presence of dibenzoylmethane as, a ligand in propionic acid at 90 degrees C for 1.5 h afforded cinnamaldehyde in 59% yield and beta-phenyleinnamaldehyde in 5% yield. This catalytic system was extended to the direct oxidative coupling through the C-H bond activation of various arenes with acrolein and methacrolein.
METHOD OF REDUCING VISCOSITY OF CONCENTRATED LIQUID CLEANSERS BY SELECTION OF PERFUME COMPONENTS
申请人:Unilever PLC
公开号:EP2300590B1
公开(公告)日:2016-11-16
Method of Controlling Structure and Rheology of Low Active Liquid Cleansers by Selecting Perfume Components
申请人:Yang Lin
公开号:US20090312223A1
公开(公告)日:2009-12-17
The invention relates to method of enhancing viscosity of low active liquid cleanser by adding perfumes individual perfume components or mixtures of components.
Method of Reducing Viscosity of Concentrated Liquid Cleansers by Selection of Perfume Components
申请人:Yang Lin
公开号:US20090312224A1
公开(公告)日:2009-12-17
The invention relates to method of reducing viscosity of high active liquid concentrate cleanser by adding perfumes, individual perfume components, or mixtures of components.