Patent classifications
C07C49/597
Process for preparing synthesis intermediates using products of natural origin and use of the intermediates obtained
Disclosed is a process for preparing a product of formula I: wherein the reaction is catalyzed both by thiamine or a thiamine salt and by ascorbic acid in a form which is free or salified or an organic acid salt of an alkaline metal, preferably sodium acetate, potassium tartrate, sodium succinate, or a reductone, preferably 2-hydroxypropanedial or 2,3-dihydroxycyclopent-2-ene-1-one in an organic solvent.
USE OF SUBSTITUTED CYCLOPENTENONES AND CYCLOPENTANONES AS AROMA INGREDIENTS
The present invention relates to use of at least one compound of formula (I) as aroma ingredient. The compound of formula (I) is used to impart an aroma impression which is reminiscent of a sweet note, technical note, tobacco note, balsamic note, herbal note, fruity note, woody note, pine needle note, eucalyptus note, powdery note, or a combination of two or more notes to a composition and also enhancing and/or modifying the aroma of a composition. The present invention is further directed to a composition comprising compound of formula (I) and (i) at least one aroma chemical different from compound of formula (I) or (ii) at least one non-aroma chemical carrier, or (iii) both (i) and (ii).
USE OF SUBSTITUTED CYCLOPENTENONES AND CYCLOPENTANONES AS AROMA INGREDIENTS
The present invention relates to use of at least one compound of formula (I) as aroma ingredient. The compound of formula (I) is used to impart an aroma impression which is reminiscent of a sweet note, technical note, tobacco note, balsamic note, herbal note, fruity note, woody note, pine needle note, eucalyptus note, powdery note, or a combination of two or more notes to a composition and also enhancing and/or modifying the aroma of a composition. The present invention is further directed to a composition comprising compound of formula (I) and (i) at least one aroma chemical different from compound of formula (I) or (ii) at least one non-aroma chemical carrier, or (iii) both (i) and (ii).
COMPOUND PRODUCING METHOD INCLUDING STEP OF ISOMERIZING ALPHA, BETA-UNSATURATED KETONE
A method for producing a compound represented by General Formula (I) below, including isomerizing a compound represented by General Formula (II) below in a presence of molecular hydrogen and/or a hydrogen source, a platinum group metal catalyst, and a simple substance of a Group 16 element (excluding oxygen) or a compound thereof:
##STR00001##
where R.sup.1-R.sup.4 are as defined in the disclosure.
COMPOUND PRODUCING METHOD INCLUDING STEP OF ISOMERIZING ALPHA, BETA-UNSATURATED KETONE
A method for producing a compound represented by General Formula (I) below, including isomerizing a compound represented by General Formula (II) below in a presence of molecular hydrogen and/or a hydrogen source, a platinum group metal catalyst, and a simple substance of a Group 16 element (excluding oxygen) or a compound thereof:
##STR00001##
where R.sup.1-R.sup.4 are as defined in the disclosure.
Methods of preparing α,β-unsaturated or α-halo ketones and aldehydes
Copper(II) bromide mediated oxidation of acylated enol and use of the reaction in the synthesis of ,-unsaturated or -bromo ketones or aldehydes are disclosed. The method provides an efficient and practical process for manufacturing dehydrohedione (DHH) and many other versatile ,-unsaturated or -bromo ketones or aldehydes in large scales to avoid using precious metal compounds.
Methods of preparing α,β-unsaturated or α-halo ketones and aldehydes
Copper(II) bromide mediated oxidation of acylated enol and use of the reaction in the synthesis of ,-unsaturated or -bromo ketones or aldehydes are disclosed. The method provides an efficient and practical process for manufacturing dehydrohedione (DHH) and many other versatile ,-unsaturated or -bromo ketones or aldehydes in large scales to avoid using precious metal compounds.
Continuous process for conversion of lignin to useful compounds
This specification discloses a process to convert a converted lignin feedstream to an aromatic composition comprised of aromatic compounds. The process follows the steps of exposing the converted lignin feedstream to at least one catalyst in the presence of donated hydrogen atoms at an exposure temperature greater than 190 C. for a time of at least thirty minutes. The donated hydrogen atoms are donated from at least one hydrogen donating compound during exposure of the converted lignin feedstream to the at least one catalyst at the exposure temperature. The resulting products are comprised largely of aromatics.
Continuous process for conversion of lignin to useful compounds
This specification discloses a process to convert a converted lignin feedstream to an aromatic composition comprised of aromatic compounds. The process follows the steps of exposing the converted lignin feedstream to at least one catalyst in the presence of donated hydrogen atoms at an exposure temperature greater than 190 C. for a time of at least thirty minutes. The donated hydrogen atoms are donated from at least one hydrogen donating compound during exposure of the converted lignin feedstream to the at least one catalyst at the exposure temperature. The resulting products are comprised largely of aromatics.
METHODS OF PREPARING a,ß-UNSATURATED OR a-HALO KETONES AND ALDEHYDES
Copper(II) bromide mediated oxidation of acylated enol and use of the reaction in the synthesis of ,-unsaturated or -bromo ketones or aldehydes are disclosed. The method provides an efficient and practical process for manufacturing dehydrohedione (DHH) and many other versatile ,-unsaturated or -bromo ketones or aldehydes in large scales to avoid using precious metal compounds.