Abstract: The invention relates to a process for the separation of L-leucine and L-isoleucine. The process is carried out by subjecting a mixture of leucine ester, and isoleucine ester, (or a mixture of leucine ester, isoleucine ester and valine ester) to an esterase catalyzed hydrolysis resulting in a selective hydrolysis of the leucine ester. The pure L-leucine can be isolated from the reaction mixture by first removing the non-hydrolyzed esters by extraction with an organic solvent and then crystallizing the L-leucine at its isoelectric point. The recovered L-iso-leucine ester is purified by distillation (if necessary), and hydrolyzed to yield pure crystalline L-isoleucine.

Abstract: Novel nitriles based on the carbon skeleton of menthane are disclosed, having the structural formula ##STR1## These compounds are useful in a variety of perfumery applications.

Abstract: Methylthiomethyl esters of aliphatic acids have been found useful in imparting or enhancing flavors in foodstuffs. They are particularly useful with respect to dairy-type flavors.

Abstract: Water-based aerosol compositions are disclosed which contain dimethylether as propellant and include a block co-polymer of ethylene oxide and propylene oxide as a surfactant to retain the active ingredients in the liquid phase.

Abstract: Novel nitriles based on the carbon skeleton of menthane are disclosed, having the structural formula ##STR1## These compounds are useful in a variety of perfumery applications.

Abstract: Methylthiomethyl esters of aliphatic acids have been found useful in imparting or enhancing flavors in foodstuffs. They are particularly useful with respect to fruit and berry flavors.

Abstract: Certain dialkyl delta-lactones are disclosed to be useful as perfumery ingredients.

Abstract: Novel nitriles based on the carbon skeleton of menthane are disclosed, having the structural formula These compounds are useful in a variety of perfumery applications.

Abstract: Novel nitriles are disclosed based on the structure of 3,7,7-trimethylbicycloheptane. These compounds are disclosed and shown to be useful as ingredients in perfume compositions.

Abstract: Novel tricyclic 1,3-dioxanes based on the skeleton of 1,1-dimethyloctalin or 1,1-dimethyldecalin and their use as perfume components is disclosed.

Abstract: A novel technique for the preparation of 4-hydroxy-5-alkyl-3-oxo-2H-furans is disclosed wherein the reaction product of an alpha-alkyl diglycolic acid diester and an oxalic acid diester is cyclized, hydrolyzed and decarboxylated. Alternatively, the corresponding 2,5-dialkyl product can be prepared by an intermediate alkylation step.

Abstract: A novel technique for the preparation of 4-hydroxy-5-alkyl-3-oxo-2H-furans is disclosed wherein the reaction product of an alpha-alkyl diglycolic acid diester and an oxalic acid diester is cyclized, hydrolyzed and decarboxylated. Alternatively, the corresponding 2,5-dialkyl product can be prepared by an intermediate alkylation step.

Abstract: New compounds having the formula ##STR1## wherein R.sub.1 represents a hydrocarbon moiety having from 1 to 7 carbon toms, R.sub.2 is hydrogen, methyl or ethyl, and R.sub.3 is hydrogen, formyl or acetyl. The compounds are useful in the preparation, modification and intensification of a great variety of flavor and perfume compositions.

Abstract: New compounds having the formula ##EQU1## wherein R.sub.1 represents a hydrocarbon moiety having from 1 to 7 carbon toms, R.sub.2 is hydrogen, methyl or ethyl, and R.sub.3 is hydrogen, formyl or acetyl. The compounds are useful in the preparation, modification and intensification of a great variety of flavor and perfume compositions.