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A route to β-substituted cyclohex-2-enones, 4-arylcoumarins, and biaryls has been developed. This approach involves a one-pot Cu0/Selectfluor-catalyzed dehydration-oxidation of tertiary cycloalcohols. Thus, by using 2 equiv. of Selectfluor at 25 °C, the dehydration-oxidation of tertiary cyclohexanols and oxabenzocyclohexanols gave β-substituted cyclohex-2-enones and 4-arylcoumarins, respectively; whereas the dehydration-oxidation of tertiary cyclohexanols gave biaryls as the final products by using 2.5 equiv. of Selectfluor at 80 °C. [ABSTRACT FROM AUTHOR]

Activation of dioxygen in air by a combined phenol/Selectfluor system has been revealed. This technique has been exploited to develop an approach to 2-ene-1,4-diones via an oxidation-dimerization of alkynes under metal-free conditions. [ABSTRACT FROM AUTHOR]

Gold(I)-catalyzed reaction of alkynes with selectfluor and water as oxygen source affords 1,2-diketones which can also be trapped with o-phenylenediamines to give quinoxaline derivatives. [ABSTRACT FROM AUTHOR]

The 1,2-dicarbonylation of alkynes with water and air as sources of oxygen is catalyzed by a cationic copper species generated in situ from copper powder and selectfluor. [ABSTRACT FROM AUTHOR]

An abstract of the article "Copper/selectfluor-system-catalyzed dehydration-oxidation of tertiary cycloalcohols: Access to β-substituted cyclohex-2-enones, 4-arylcoumarins, and biaryl ls," by S. Ren and colleagues is presented.

A transition-metal-free, Selectfluor-mediated reaction of aroyloxiranes gives 1,2-diketones in moderate to good yields under oxidative conditions involving a ring-opening/benzoyl rearrangement/C-C cleavage sequence. [ABSTRACT FROM AUTHOR]