A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A method for synthesizing xanthohumol (XN) from naringenin includes the steps of acylating hydroxyl groups of a naringenin flavone moiety to obtain an acylation product, a reaction of conversion of the flavone moiety into a chalcone moiety, and subjecting the chalcone compound to a reaction of hydrolysis of its ester groups, and next to a reaction of substitution of a prenyl moiety of the chalcone moiety to obtain xanthohumol. The xanthohumol produced by this method can be purified using crystallisation.

A method for synthesizing xanthohumol (XN) from naringenin includes the steps of acylating hydroxyl groups of a naringenin flavone moiety to obtain an acylation product, a reaction of conversion of the flavone moiety into a chalcone moiety, and subjecting the chalcone compound to a reaction of hydrolysis of its ester groups, and next to a reaction of substitution of a prenyl moiety of the chalcone moiety to obtain xanthohumol. The xanthohumol produced by this method can be purified using crystallisation.

The present invention relates to an enzymatic synthesis of 4-ethynyl-2-deoxy nucleosides and analogs thereof, for example EFdA, that eliminates the use of protecting groups on the intermediates, improves the stereoselectivity of glycosylation and reduces the number of process steps needed to make said compounds. It also relates to the novel intermediates employed in the process.

The present invention relates to an enzymatic synthesis of 4-ethynyl-2-deoxy nucleosides and analogs thereof, for example EFdA, that eliminates the use of protecting groups on the intermediates, improves the stereoselectivity of glycosylation and reduces the number of process steps needed to make said compounds. It also relates to the novel intermediates employed in the process.

A novel fragrance carrier comprising 1,2,3-triacetoxypropane (triacetin) of formula I: ##STR00001##

A novel fragrance carrier comprising 1,2,3-triacetoxypropane (triacetin) of formula I: ##STR00001##

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

The present invention relates to a compound of formula (I), in particular for the use thereof for depigmenting, lightering and/or bleaching the skin. (I) In which R1 and R2, which may be identical or different, denote hydrogen, or a COR5 radical in which R5 denotes a linear C1-C10 or branched C3-C10 alkyl radical, preferably a linear C1-C6 or branched C3-C6 alkyl radical, more preferentially a linear C1-C4 alkyl radical, R3 denotes a linear C1-C6 or branched C3-C6 alkyl radical, preferably a linear C1-C4 or branched C3-C4 alkyl radical, and R4 denotes H, a linear C1-C6 or branched C3-C6 alkyl radical, or a COR5 radical, and also the salts thereof, the solvates thereof and the optical isomers thereof, and the racemic mixtures thereof, alone or as a mixture. The present invention also relates to the novel compounds (I) and also to the process for preparing same and to a cosmetic process for depigmenting the skin using such compounds (I).

##STR00001##