Polymerization by oxidative coupling. II. Oxidation of 2,6-disubstituted phenols

Co-polymerization of penta-halogenated phenols in humic substances by catalytic oxidation using biomimetic catalysis.

INTRODUCTION A synthetic water-soluble meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrinate of iron(III) chloride, Fe-(TDCPPS)Cl, was employed to catalyze the oxidative co-polymerization of penta-halogenated phenols in two humic materials of different origin. MATERIALS AND METHODS Co-polymerization of pentachlorophenol (PCP) was followed by high-performance size-exclusion chromatography (HP...

Metal-free oxidative para cross-coupling of phenols.

Electrochemical Oxidation of Chlorinated Phenols

Electrochemical oxidation has been proposed as a remediation method for chlorinated phenols but is hampered by anode fouling. In this work we explore the mechanism of anode fouling by chlorinated phenols, compare structure vs reactivity for phenols differing in the extent of chlorination, and relate the efficiency of oxidation to the mechanism of oxidation at different electrode types. Linear s...

Elucidation of the Stereochemistry of Diterpene Derivatives Obtained by Palladium Catalyzed Oxidative Coupling-Oxidation of Camphene

As estruturas dos derivados diterpénicos resultantes do acoplamento oxidativo oxidação do canfeno catalisados por paládio, ou seja, bis(2,2-dimetil-biciclo[2.2.1]hepto-3-ilideno)etano e (4,4dimetilbiciclo[3.2.1]octo-2-on-3-il)(2,2-dimetilbiciclo[2.2.1]hepto-3-ilideno)metano, foram estudadas utilizando-se as técnicas de RMN de H e de C uni e bidimensionais. Sua estereoquímica foi determinada uti...

Selective Oxidative Homo- and Cross-Coupling of Phenols with Aerobic Catalysts

Simple catalysts that use atom-economical oxygen as the terminal oxidant to accomplish selective ortho-ortho, ortho-para, or para-para homo-couplings of phenols are described. In addition, chromium salen catalysts have been discovered as uniquely effective in the cross-coupling of different phenols with high chemo- and regioselectivity.