摘要:
The present invention relates to a method of preparation of an optically active cyclohexenone derivative of Formula (I) O R 1 R 2 * R 1 and wherein R 1 and R 2 are organic residues.
摘要翻译:本发明涉及制备式(I)O R 1 R 2 * R 1的光学活性环己烯酮衍生物的方法,其中R1和R2是有机残基。
摘要:
A method of synthesizing a substituted cyclopentadiene compound. The synthesis comprises a step of cyclizing, in the presence of a phosphorous pentoxide/methanesulfonic acid reagent, an alpha,beta-unsaturated carboxylic acid, cycloalkyl ester compound to make a substituted cyclopentenone compound, and converting the substituted cyclopentenone compound to the substituted cyclopentadiene compound. Also, a method of synthesizing a substituted metallocene compound comprising a metal-(substituted cyclopentadienyl ligand) complex, wherein the substituted cyclopentadienyl ligand is made from the substituted cyclopentadiene compound. A metal-(substituted cyclopentadienyl ligand) complex and substituted metallocene compound made by the method and a substituted metallocene catalyst made therefrom.
摘要:
Disclosed herein are the novel insect repellents of formula (I) to control the spread of various tropical diseases and to the process of preparation thereof wherein R, Rl, R3, R4 represents hydrogen or alkyl; R2 is selected from hydrogen, alkyl, C02R, C02H; 'n' is 1, 2, or 3; wherein any two of Rl, R2, R3 or R4 may form a 3-8 membered carbocyclic ring which may optionally be substituted or may contain a heteroatom; X is selected from O, S or CH2; ' ' represents a single or double bond; wherein, either of the ring in formula (I) may additionally contain at least one carbonyl group.
摘要:
Se proporcionan nuevos ligandos quirales bidentados enantioméricamente enriquecidos de fórmula (I) o sus correspondientes enantiómeros de fórmula (I') que forman una coordinación tipo puente con complejos de dicobaltohexacarbonilo, en particular de manera diastereoselectiva cuando el alquino es monosustituido o disustituido con los dos sustituyentes diferentes. Se proporciona asimismo un procedimiento para la preparación de dichos ligandos quirales y un procedimiento para la preparación de los complejos de alquino-dicobaltotetracarbonilo. Los nuevos complejos de alquino-dicobaltotetracarbonilo formados permiten llevar a cabo la reacción de Pauson-Khand de manera enantioselectiva y con rendimientos elevados y, por tanto, son útiles en la síntesis de productos ciclopentánicos farmacéuticos y/o con actividad biológica.
摘要:
The present invention relates to a cyclohexanone derivative of formula (I) in the form of any one of its isomers or mixture thereof. The invention concerns also the preparation and the use of said derivative. The invention's compound is a useful starting material for the preparation of various optically active compounds.
摘要:
A method comprising synthesizing a substituted cyclopentenone compound via reaction of a substituted cycloalkyl acrylate ester in the presence of phosphorous pentoxide/methanesulfonic acid reagent to make the substituted cyclopentenone compound.
摘要:
The invention relates to plant extracts and bioactive molecules derived from the plant genus Acronychia and their use as antioxidants, antibacterials, anthelmintic, anti-inflammatories, cancer chemopreventatives, food additives and fragrance components in pharmaceuticals, nutraceuticals, foods and cosmetics.