A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.

A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.

The present invention discloses a method for preparing aldehydes or ketones via aerobic oxidation of alcohols with the copper salts and nitroxide radicals as catalysts. Both oxygen and air could be used as oxidants, after 4 to 48 hours of reaction in an organic solvent at room temperature, the alcohols are efficiently oxidized to the corresponding aldehydes or ketones. The present invention has the following advantages: easy to operate, refraining from using chlorides which are corrosive to equipment, readily available raw materials and reagents, mils reaction conditions, the broad substrate scope, good functional group tolerance, convenient purification, environmentally friendly and no pollution. Thus, the method is suitable for industrial production.

Described herein are compounds of formula (I) as properfume compounds. In particular, described herein is a method to release a compound being a ketone of formula (II), a formate ester of formula (III), and/or an alcohol of formula (IV) by exposing the compound of formula (I) to an environment wherein it is oxidized. Moreover, a perfuming composition and a perfumed consumer product including at least one compound of formula (I) are also described.

Described herein are compounds of formula (I) as properfume compounds. In particular, described herein is a method to release a compound being a ketone of formula (II), a formate ester of formula (III), and/or an alcohol of formula (IV) by exposing the compound of formula (I) to an environment wherein it is oxidized. Moreover, a perfuming composition and a perfumed consumer product including at least one compound of formula (I) are also described.

Described herein are compounds of formula (I) as properfume compounds. In particular, described herein is a method to release a compound being a ketone of formula (II), a formate ester of formula (III), and/or an alcohol of formula (IV) by exposing the compound of formula (I) to an environment wherein it is oxidized. Moreover, a perfuming composition and a perfumed consumer product including at least one compound of formula (I) are also described.

A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.

A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.

Process for the preparation of 3-methyl-2-buten-1-al, wherein 2-methyl-3-buten-2-ol is reacted to 3-methyl-2-buten-1-al in the presence of a catalyst, wherein the catalyst comprises a catalytically active metal and wherein the reaction is conducted at a pH of ≤7.

Process for the preparation of 3-methyl-2-buten-1-al, wherein 2-methyl-3-buten-2-ol is reacted to 3-methyl-2-buten-1-al in the presence of a catalyst, wherein the catalyst comprises a catalytically active metal and wherein the reaction is conducted at a pH of ≤7.