b -Ionylidene acetaldehyde, and C18 ketone and Vitamin A acid therefrom are obtained by reducing b -ionylidene acetonitrile with LiAlH4 at low temperatures, followed by hydrolysis, and, if desired, conversion by known methods into the above-mentioned derivatives. The aldehyde is further separated...
Measurements of competitive adsorption of acetic acid and methyl ethyl ketone from aqueous solution onto different carbons and pyrolyzed polymers showed that a higher surface density of active hydrogen sites, as measured by reaction with LiAlH4, leads to an improved selectivity for the carboxylic acid...
Finally, this compound is reduced with H2 over Pt in aqueous concentrated HCl. The starting products are prepared as follows: 1) The acrylic acid (II) is obtained by condensation of maleic anhydride (VI) with 4-trifluoromethylphenylmagnesium bromide (VII) by means of ZnCl2 in refluxing ethyl...
using C-carbonate as a raw material to prepare CH3OH through a LiAlH4 reduction method, performing an iodination reaction to the CH3OH by using phosphorous compounds and iodine elementary substances to generate CH3I, and obtaining the double labeled C2-acetic acid after performing grignard reaction...
A process for the preparation of 2 - aryl substituted 2 - halophenoxy - acetic acid estersBesides an inert carrier, the agent for regulating development processes in plants contains, as active component, a compound of the formula: in which R1 denotes H, alkyl, aryl, beta -dialkylaminoalkyl...
PREPARATION:An ester compound expressed by formulaII is converted into a compound having protected OH group, which is reduced with LiAlH4, etc. to afford a compound expressed by formula III (R<1> is a protecting group). The resultant compound is then converted into a p-toluenesulfonic acid ...
PREPARATION:An ester compound expressed by formulaII is converted into a compound having protected OH group, which is reduced with LiAlH4, etc. to afford a compound expressed by formula III (R<1> is a protecting group). The resultant compound is then converted into a p-toluenesulfonic acid ...
The alcohols of the formula II are prepared by reducing esters of the formula I with a mixed metal hydride, preferably LiAlH4. The agent can be used for delaying the longitudinal growth and increasing the resistance of cereal stems to lodging....