Copper(II) bromide mediated oxidation of acylated enol and use of the reaction in the synthesis of ,-unsaturated or -bromo ketones or aldehydes are disclosed. The method provides an efficient and practical process for manufacturing dehydrohedione (DHH) and many other versatile ,-unsaturated or -bromo ketones or aldehydes in large scales to avoid using precious metal compounds.

The present invention provides for a method for depolymerizing a lignin, said method comprising: (a) providing a metal catalyst, and (b) contacting a lignin to the metal catalyst, such that the metal catalyst depolymerizes at least a portion of the lignin into one or more lignin monomers.

The present invention provides for a method for depolymerizing a lignin, said method comprising: (a) providing a metal catalyst, and (b) contacting a lignin to the metal catalyst, such that the metal catalyst depolymerizes at least a portion of the lignin into one or more lignin monomers.

Disclosed are cyclopent-2-enone derivatives possessing woody odor profile with some peppery notes.

Disclosed are cyclopent-2-enone derivatives possessing woody odor profile with some peppery notes.