摘要:
The present invention relates to a polymer blend, comprising (a) at least one hydrophobic polymer, as component A, (b) at least one hydrophilic polymer, as component B, and (c) at least one structural unit that crosslinks component A and/or B and derives from at least one compound selected from the group consisting of aldehydes, dialdehydes, diketones, aldehyde ketones, derivatives of the above-mentioned compounds, and mixtures thereof, as component C, and to processes for the production thereof and to the use thereof.
摘要:
A process for the preparation of carbonyl compounds by oxidation of alcohols in the gas phase with a gas containing oxygen in the presence of catalysts containing copper and silver.
摘要:
A method for the total chemical synthesis of flavipucine employs the condensation of 4-hydroxy-6-methyl-2-pyridone with isobutylglyoxal in alkali alkoxide. The resulting alkali salt is acylated in both the 1' and 4 positions. Treatment of the 1',4-diacyloxy derivative with excess alkaline peroxide yields flavipucine.
摘要:
Dispersions of transition and other metal halides in molten tetrahydrocarbylammonium or phosphonium trihalostannate (II) and trihalogermanate (II) salts are useful as catalysts for the hydrogenation, isomerization or carbonylation of olefins and the hydrogenation of nitriles.
摘要:
ARYL PYRIDINE CARBOXLIC ACIDS AND THEIR DERIVATIVES ARE DESCRIBED AND THE PROCESSES FOR PREPAING THE SAME ARE DISCLOSED. THESE COMPOUNDS EXHIBITS ANTI-FLAMMATORY PROPERTIES AND ALSO POSSESS AN EFFECTIVE DEGREE OF ANTIPYRETIC AND ANALGESIC ACTIVITY.
摘要:
The present invention refers to aryl beta diketones of the formula (I) wherein Y, R1, R2 and R3 have the meaning R1 is selected from the group consisting of hydrogen, C1-C4 alkyl, hydroxyl, methoxy, CF3 and F; R2 is selected from the group consisting of methyl and ethyl; R3 is selected from the group consisting of methyl and ethyl; and Y is a bivalent residue selected from the group consisting of —C(O)—; —CH2═CH2—C(O)—; —CRIRII—C(O)—, wherein RI and RII are independently selected from hydrogen and methyl; and —CHRIII—CHRIV—C(O)—, wherein RIII and RIV are independently selected from hydrogen and methyl with the proviso, that RIII═RIV are hydrogen or either RIII or RIV is methyl. The invention further refers to fragrance compositions and fragranced articles comprising them.
摘要:
Heterocyclyl-hydroxyalkyl-azolyl derivatives of the formula ##STR1## in which Az represents 1,2,4-triazol-1-yl, 1,2,4-triazol-4-yl or imidazol-1-yl,Het represents optionally substituted dioxolanyl or 1,3-dioxanyl,R represents alkyl, optionally substituted phenyl, optionally substituted phenylalkyl, optionally substituted phenoxyalky, optionally substituted phenylthioalkyl, optionally substituted cycloalkyl, optionally substituted cycloalkylalkyl, alkenyl, optionally substituted phenylalkenyl, optionally substituted cyclohexylalkenyl, furyl, naphthyloxymethyl or azolylalkyl,R' represents hydrogen, optionally substituted alkyl or alkenyl andn represents the number 0 or 1,or addition products thereof with acids or metal salts, which possess fungicidal activity.
摘要:
The invention relates to a process for the preparation of glyoxal, alkylglyoxals and acetals thereof by reacting .alpha.,.beta.-unsaturated dialkylacetals with the equivalent amount of ozone and subsequently subjecting the ozonization products to catalytic hydrogenation, the peroxide-containing ozonization solution being fed continuously into a suspension of the hydrogenation catalyst, while a peroxide content of not more than 0.1 mole/liter is maintained, and cleaving the ozonization products by reduction, after which the dialkylacetals formed in the hydrogenation are, if desired, cleaved to give glyoxal or alkylglyoxals.
摘要:
2-(2-Hydroxy-3-oxobutyl)-3,3-dimethylcyclopropanecarbaldehyde and certain derivatives thereof are useful intermediates for the preparation of dihalovinyl-type pyrethroid esters.
摘要:
Various compounds are disclosed to be useful in the flavoring of foodstuffs, animal feeds, beverages, pharmaceutical preparations and tobacco products. These compounds are equally useful perfuming ingredients.