The present invention discloses a process for preparation of white curcumin from purified curcuminoids. The curcuminoids are obtained by solvent extraction and crystallization of dried turmeric powder. The autoclave is charged with ethyl acetate and the 95% purity curcuminoids mixture is added to and stirred for uniformity at room temperature. 5% (w/w) of 10% palladium carbon is added to the reaction mixture and allowed for hydrogenation in the presence of hydrogen gas at 2 lbps pressure and stirred continuously for 15 hours. Once the reaction is completed, the reaction mixture is filtered and washed with ethyl acetate. The ethyl acetate is distilled off and crude mass is stirred with water to obtain a solid precipitate. Finally, the solid obtained is filtered and dried to pale brown crystals of white curcumin. White curcumin is encapsulated with beta-cyclodextrin, which exhibited increased bioavailability. White curcumin also exhibited anti-oxidant and chemopreventive activities.

A method is described for preparing cyclopropyl-substituted acetophenones of the general formula (I). ##STR00001##

A method is described for preparing cyclopropyl-substituted acetophenones of the general formula (I). ##STR00001##

A method is described for preparing cyclopropyl-substituted acetophenones of the general formula (I).

##STR00001##

A method is described for preparing cyclopropyl-substituted acetophenones of the general formula (I).

##STR00001##

The present invention relates to the field of aquatic product processing and storage; to solve the problems in that a photosensitizer generates low active oxygen during photodynamic sterilization and that the preservation effect of aquatic products needs to be improved, a halogenated curcumin derivative, a preparation method therefor, and an application thereof in the preservation of the aquatic product are disclosed. The halogenated curcumin derivative contains mono-substituted or bi-substituted halogenated groups; the halogenated curcumin derivative can be prepared by a one-step method and used for photodynamic sterilization of aquatic products. The preparation steps of the present invention are simple, the reaction conditions are mild, and the prepared halogenated curcumin derivative has high singlet oxygen yield under blue light irradiation. The present invention has good sterilization and preservation effects on aquatic products, can effectively prolong the shelf life of fresh shrimp, and has little impact on the sensory properties of the food.

The present invention relates to the field of aquatic product processing and storage; to solve the problems in that a photosensitizer generates low active oxygen during photodynamic sterilization and that the preservation effect of aquatic products needs to be improved, a halogenated curcumin derivative, a preparation method therefor, and an application thereof in the preservation of the aquatic product are disclosed. The halogenated curcumin derivative contains mono-substituted or bi-substituted halogenated groups; the halogenated curcumin derivative can be prepared by a one-step method and used for photodynamic sterilization of aquatic products. The preparation steps of the present invention are simple, the reaction conditions are mild, and the prepared halogenated curcumin derivative has high singlet oxygen yield under blue light irradiation. The present invention has good sterilization and preservation effects on aquatic products, can effectively prolong the shelf life of fresh shrimp, and has little impact on the sensory properties of the food.

The present invention provides mixtures of compounds and compounds having the formula:

##STR00001##

which are useful as functionalized photoinitiators and which may be used directly or after further functionalization in various photo-curable coating compositions, including varnishes, lacquers, printing inks and the like. The present invention also relates to a process to prepare the mixtures and the compounds. The present invention also provides radiation-curable surface coating compositions which include at least one of the compounds of the present invention as a photoinitiator. The compounds are especially suitable for radiation curable formulations which are intended for applications where low extracables or leachables are used such as printing inks for food packaging.

The present invention provides mixtures of compounds and compounds having the formula:

##STR00001##

which are useful as functionalized photoinitiators and which may be used directly or after further functionalization in various photo-curable coating compositions, including varnishes, lacquers, printing inks and the like. The present invention also relates to a process to prepare the mixtures and the compounds. The present invention also provides radiation-curable surface coating compositions which include at least one of the compounds of the present invention as a photoinitiator. The compounds are especially suitable for radiation curable formulations which are intended for applications where low extracables or leachables are used such as printing inks for food packaging.

The disclosure provides a dual-catalysis system for direct conversion of olefins to alcohols. The cooperative catalytic system contains one oxidizing catalyst and one transfer-hydrogenation catalyst. A wide variety of olefins, including aromatic and aliphatic olefins, can be used as the reactant. The transformation proceeds with anti-Markovnikov selectivity, and in some aspects provides primary alcohols as major products. The disclosure further provides a system for oxidation of olefins with anti-Markovnikov selectivity.