Abstract:
A process for preparing plant extracts is provided. Plant materials, including tropolones, lignins and polar molecules, are mixed with a liquid polar solvent to form an extraction mixture, which is maintained under extraction conditions effective to extract lignins, polar molecules and at least 50% of the tropolones into the polar solvent to form a pregnant polar solvent liquid phase. The pregnant polar solvent phase is separated from the solid plant materials, and mixed with a substantially immiscible nonpolar solvent under conditions effective to partition the tropolones and lignins substantially into the nonpolar solvent and to partition the polar molecules substantially into the polar solvent to form a partitioned nonpolar solvent phase comprising lignins and tropolones, and a partitioned polar solvent phase comprising the polar molecules, and separating the polar solvent phase from the nonpolar solvent phase to obtain a polar plant extract and a nonpolar plant extract.
Abstract:
The present invention relates to phytocassanes which are novel diterpene compounds exhibiting an antifungal activity against rice blast fungus, Pyricularia oryzae (Magnaporthe grisea) and rice sheath blight fungus, Rhizoctonia solani, and more specifically, it relates to phytocassanes A, B, C, D, and EL and a process for producing phytocassanes or momilactones, antifungal diterpene compounds, at a high yield.
Abstract:
Fragrance materials prepared by acylation of trimethyl cyclododecatriene, processes for producing same, and perfume compositions containing such materials.
Abstract:
The present invention relates to compounds and compositions for effective biofilm prevention. Particularly, the invention provides compositions comprising certain cyclic ketones found to be efficient in preventing bacterial biofilm formation.
Abstract:
Novel tricyclic compounds of formula I as defined in the specification, a process for their preparation and their use for the preparation of optically active or racemic colchicine and thiocolchicine derivatives.
Abstract:
The invention relates to a method for producing cyclododecanone (CDON). During the production, contaminated cyclododecane (CDAN) is produced. This can be separated from CDON by distillation (CDAN-containing fraction). The separation of CDAN and impurities such as 13-oxabicyclo [7.3.1]tridecane occurs by crystallizing out CDAN from the CDAN-containing fraction.
Abstract:
The invention relates to a method for producing monocyclic ketones C7–C20.The method of patent protection sought is based on the oxidation reaction of monocyclic alkenes C7–C20 into corresponding monocyclic ketones with nitrous oxide or a mixture thereof with inert gas. The process proceeds at a temperature ranging from 20 to 350° C. and a pressure of the nitrous oxide ranging from 0.01 to 100 atm.The process provides a high selectivity involving the target product, blast-resistant work operations and is promising for industrial use.
Abstract:
FRAGRANCE MATERIALS PREPARED BY ACYLATION OF TRIMETHYL CYCLODODECATRINE, DIHYDRO AND TETRAHYDRO DERIVATIVES THEREOF, PROCESSES FOR PRODUCING SAME, AND PURFUME COMPOSITIONS CONTAINING SUCH MATERIALS.