摘要:
The present invention relates to compounds of formula (I) wherein R1 signifies a C1-C15 alkyl moiety or a C2 to C18 alkenyl moiety, to their process of production as well as to their use in organic synthesis, especially as intermediates (building blocks) in the synthesis of vitamin A or &bgr;-carotene or derivatives thereof, or other carotenoids, e.g. canthaxanthin, astaxanthin or zeaxanthin, preferably vitamin A.
摘要:
An object of the present invention is to provide a new insecticidal compound by paying attention to the insecticidal activity contained in the flower part of marigold, and to provide an insecticide containing the compound as an active ingredient. There are provided an insecticidal compound represented by the following chemical formula: [Formula 1], and an insecticide containing the insecticidal compound as an active ingredient or an insecticide containing, as active ingredients, the insecticidal compound and an insecticidal compound represented by the following chemical formula: [Formula 2], wherein the insecticide can exhibit extraordinary insecticidal efficacy compared with existing pyrethroid-based insecticidal compounds.
摘要:
The present disclosure describes processes for the epimerization of a cyclohexene comprising the steps of providing to a reactor a first isomer of a 1-(2-alkyl-3-cyclohexen-1-yl)-alkanone compound according to Formula I I wherein R1 ad R2 are each independently C1-C4 alkyl, and R3, R4, R5, R6, R7, and R8 are each independently selected from the group consisting of H and C1-C4 alkyl; and epimerizing the first isomer of the 1-(2-alkyl-3-cyclohexen-1-yl)-alkanone with a metal alkoxide base to form a second isomer of the 1-(2-alkyl-3-cyclohexen-1-yl)-alkanone.
摘要:
Trimethylcyclohexane derivatives represented by general formula (1): wherein A represents C=O or CH-OH; n is 2; R represents hydrogen or methyl; R represents linear or branched and optionally saturated C3-10 hydrocarbyl; and the dotted line represents an optionally saturated carbon-carbon bond; melanin-formation inhibitors and perfume-holding agents containing one or more of the above derivatives, and skin preparations for external use characterized by containing one or more melanin-formation inhibitors and/or perfume-holding agents described above.