摘要:
Process for preparing aryl hydroxyethyl sulfones of the general formula (1)Ar--SO.sub.2 --CH.sub.2 --CH.sub.2 --OH (1)in which Ar denotes a phenyl or naphthyl radical, by reacting an aromatic of the formula (2)Ar--H (2)in which Ar has the abovementioned meanings, with carbyl sulfate at temperatures of 30.degree. to 100.degree. C., in the presence or absence of an organic solvent which is inert toward the reactants, then adding water or methanol to decompose the boron trichloride, and isolating the resulting aryl hydroxyethyl sulfone.
摘要:
A process for the preparation of aromatic dialkylamines of the formula (1) ##STR1## in which R denotes an alkyl-C.sub.1 -C.sub.6 group, X and Y each denote a hydrogen, fluorine or chlorine atom or a hydroxyl, alkyl-C.sub.1 -C.sub.4, alkoxy-C.sub.1 -C.sub.4, carboxyl, carbalkoxy-C.sub.1 -C.sub.5, alkyl-C.sub.1 -C.sub.4 --CO--NH--, ##STR2## sulfonic acid, alkyl-C.sub.1 -C.sub.4 sulfonate, sulfamoyl, alkyl-C.sub.1 -C.sub.4 -sulfonyl, hydroxy-alkylene-C.sub.1 -C.sub.4 -sulfonyl, phenylsulfonyl, hydroxyphenylsulfonyl, alkyl-C.sub.1 -C.sub.4 -phenylsulfonyl or alkoxy-C.sub.1 -C.sub.4 -phenylsulfonyl group, wherein compounds of the formula (2) ##STR3## in which R.sub.1 denotes a nitro or primary amino group, and X and Y have the mentioned meanings, are reductively dialkylated using at least equimolar amounts of an aldehyde of the formula (3) ##STR4## in which R has the abovementioned meaning, in alcohols, alkylbenzenes, glycol ethers, fatty acid dialkylamides or fatty acid alkyl esters or fatty acid glycol esters, and using catalytically activated hydrogen in the presence of a precious metal catalyst of group 8 of the periodic table, if appropriate in the presence of catalytic amounts of a trialkyl-C.sub.1 -C.sub.6 -amine, at 50.degree. C. to 150.degree. C. at a pressure of 20 bar to 100 bar.
摘要:
Process for the preparation of 1-hydroperoxy-16-oxabicyclo[10.4.0]hexadecane (DDP-OOH), wherein 13-oxabicyclo[10.4.0]hexadec-1(12)-ene (DDP) and hydrogen peroxide are reacted in a diluent in the presence of a strong acid, the diluent has a pKa value of greater than or equal to 4.5 and the strong acid has a pKa value of less than or equal to 1.5, wherein after the reaction has taken place, the strong acid is neutralized with at least 0.9 molar equivalent of a base.
摘要:
The invention relates to an infiflely variable toroidal drive comprising a housing 1, an input shaft 3, a torque shaft 34, two input discs 5, 15 with toroidal inner surfaces and two output discs 6, 16 with toroidal inner surfaces. One input disc and one output disc each form a pair and the two output discs are arranged next to each other and in mirror symmetry. The toroidal drive also comprises several friction wheels for transmitting a torque from the input disc to the corresponding output disc, an output shaft 10 and a gear wheel system 8, 9 between the output discs and the output shaft. A holding frame 2 is removably fastened to the drive housing 1,which frame consists of an upper frame clamp 28, a lower frame clamp 29 and a cup-shaped bearing support member 7. The lowerframe clamp 29 has a recess 45 and one end of the output shaft 10 is mounted via a bearing 32 in a rotating manner.
摘要:
The invention relates to new thio-alkanones of the formula ##STR1## in which X represents an oxygen or sulphur atom,R.sub.1 represents hydrogen or a C.sub.1 -C.sub.2 -alkyl group and the broken lines represent a single bond or no bond,to a process for their preparation and their use as flavorings.
摘要:
The use of 2,4′-dimethylpropiophenone as a fragrance substance is described, preferably as a fragrance substance for imparting, modifying and/or reinforcing one, two, three or all the odor notes floral, rosy, rose oxide-like and herbal-like, preferably both of the odor notes rose oxide-like and herbal-like.
摘要:
The present invention concerns mixtures with cis-3,3,5-trimethylcyclohexyl esters and trans-3,3,5-trimethylcyclohexyl esters, the use of cis-3,3,5-trimethylcyclohexyl esters as fragrance substances and individual cis-3,3,5-trimethylcyclohexyl esters and their uses.
摘要:
The present invention relates to a method for manufacturing menthol by catalytic hydration of compounds having the carbon network of menthane with at least one double bond and which are substituted in 3-position by oxygen and/or catalytic rearrangement of stereoisomers of the menthol in the presence of hydrogen and doped nickel catalysts.
摘要:
The invention relates to a process for the production of cyclohexadecanone by hydrogenation of cyclohexadecenone and odoriferous substance mixtures, as well as products containing the cyclohexadecanone according to the invention.