摘要:
The present invention relates to nebivolol synthesis method and intermediate compound thereof. Specifically, the present invention relates to a method for synthesizing nebivolol, intermediate compound thereof, and a method for preparing the intermediate compound.
摘要:
Provided are a method for producing a terminal conjugated dienal compound without an oxidation reaction and a terminal hydroxyacetal compound useful as an intermediate in the method. More specifically, provided are a method for producing an (E)-dienal compound comprising the steps of: a metalation reaction of an alkynal acetal compound(1) to obtain an organic metal compound (2), an addition reaction of (2) to ethylene oxide to obtain a hydroxyalkynal acetal compound (3), a reduction reaction of (3) to obtain an (E)-hydroxyalkenal acetal compound (4), a functional group conversion reaction of (4) to obtain an (E)-alkenal acetal compound (5) having a leaving group X, an elimination reaction of (5) to obtain an (E)-dienal acetal compound (6), and a hydrolysis reaction of (6) to obtain the (E)-dienal compound (7); and others.
摘要:
An object is to provide a process for providing hydrogen or heavy hydrogens conveniently without the necessity of large-scale equipment and a process capable of performing hydrogenation (protiation, deuteration or tritiation) reaction conveniently without the use of an expensive reagent and a special catalyst. The production process includes a process for producing hydrogen or heavy hydrogens, containing subjecting water or heavy water to mechanochemical reaction in the presence of a catalyst metal, and a process for producing a hydrogenated (protiated, deuterated or tritiated) organic compound, containing subjecting an organic compound and water or heavy water to mechanochemical reaction in the presence of a catalyst metal.
摘要:
The present invention relates to [1] a method of producing 1-(2-t-butylcyclohexyloxy)-2-butanol including a step of hydrogenating 1- (2-t-butylphenyloxy) -2-butanol under a condition at a hydrogen pressure of from 1 to 5 MPa in the presence of a palladium catalyst (A) supported on peat-derived active carbon and a metal catalyst (B) containing one or more kinds of members selected from ruthenium, rhodium, platinum, and nickel; and [2] a perfume composition containing 1-(2-t-butylcyclohexyloxy)-2-butanol obtained by the foregoing method. According to the present invention, 1-(2-t-butylcyclohexyloxy)-2-butanol having a woody or amber-like fragrance as a perfume material and excellent fragrance notes can be obtained in a high purity because of a small remaining amount of a reaction intermediate and in a high yield.
摘要:
The present invention relates to ethers of 1,2-, 1,3-and 1,4-bis(hydroxymethyl)cyclohexanes, to the preparation of such ethers and also to the use of such ethers as fragrances and as formulation auxiliaries in fragrance-comprising preparations.
摘要:
The present invention relates to an improved process of production of substituted diphenylacetylenes (tolanes) of formula (I) which are starting materials for production of stilbenes products.
摘要:
Compounds of formula (I), wherein R1 and R2 are, independently of one another, H,C1-C6alkyl, C1-C6halogenalkyl, C1-C6alkoxy, C1-C6alkoxy-C1-C6alkyl, or C1-C6alkoxy-C1-C6alkyloxy, and R3 is C1-C6alkyl, are obtainable in high yiedls by stereoselective addition of R3-substituted propionic acid esters to R1- and R2-substituted benzaldehydes of formula R-CHO to form corresponding 3-R-3-hydroxy-2-R3-propionic acid esters, conversion of the OH group to a leaving group, subsequent regioselective elimination to form 3-R-2-R3-propenic acid esters, and reduction to corresponding 3-R-2-R3-allyl alcohols and their enantioselective hydrogenation, wherein R is (a).
摘要:
Cycloalkylvinylether der allgemeinen Formel I in der n für eine ganze Zahl von 7 bis 15 steht, insbesondere Cyclododecylvinylether, deren Herstellung und Verwendung.
摘要:
Cycloalkylvinylether der allgemeinen Formel I in der n für eine ganze Zahl von 7 bis 15 steht, insbesondere Cyclododecylvinylether, deren Herstellung und Verwendung.
摘要:
Neue 2-tert.-Butyl-4-methyl-cyclohexanolderivate der allgemeinen Formel I in der R¹ für eine Alkylgruppe mit 1 bis 3 C-Atomen oder eine Acylgruppe steht, in der R² einen Alkylrest mit 1 bis 5 C-Atomen bedeutet, sowie ein Verfahren zu deren Herstellung, deren Verwendung als Riechstoffe und Riechstoffkompositionen enthaltend Verbindungen der Formel I. Besonders interessante Verbindungen sind 2-tert.-Butyl-4-methyl-cyclohexyl-acetat und -propionat.