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WO/1999/025678A1 |
A process for the production of at least one C¿4? compound selected from 1,4-butanediol, $g(g)-butyrolactone and tetrahydrofuran, in which a solution of maleic anhydride in a high boiling ester is esterified with a C¿1? to C¿4? alcoho...
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WO/1999/025675A1 |
A process is described for the production of butane-1,4-diol, $g(g)-butyrolactone and/or tetrahydrofuran. A vaporous stream containing maleic anhydride, water, and carbon oxides is contacted in an absorption zone with a high boiling este...
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WO/1999/023086A1 |
Preparation of 4-hydroxy substituted butyrolactones is described. A process for the preparation of 3-hydroxybutyrolactone, 1,2,4-trihydroxybutane and 3,4-dihydroxy acid methyl ester from malic acid is particularly described. The preparat...
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WO/1998/047891A1 |
Cyclic products are prepared by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of one or several homogeneous or heterogeneous metathesis catalysts in a reaction medium. The invention is character...
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WO/1998/041517A1 |
A process for producing $g(d)-valerolactone derivatives of general formula (II), (wherein R?1� and R?2� are the same and each represents an alkyl group having 1 to 6 carbon atoms) characterized by catalytically dehydrogenating tetrah...
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WO/1998/022454A1 |
Method for producing $g(d)- and $g(e)-lactones of formula (I), in which the radical R may be the same or different, and stand for hydrogen, optionally substituted aliphatic, cycloaliphatic, aromatic, araliphatic or heterocyclic radicals,...
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WO/1997/043242A1 |
A process is described for the production of at least one C4 compound selected from butane-1,4-diol, 'gamma'-butyrolactone and tetrahydrofuran, which includes the step of hydrogenation in the vapour phase of a di-(C1 to C4 alkyl) maleate...
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WO/1997/043234A1 |
A process is described for the production of at least one C4 compound selected from butane-1,4-diol, 'UPSILON'-butyrolactone and tetrahydrofuran, which includes the step of hydrogenation in the vapour phase of maleic anhydride in the pre...
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WO/1997/038156A1 |
The invention concerns a process for continuously supplying liquid during the boiling of cellulose in a boiler, the liquid which is used in a given process step being able to circulate between at least two containers or tanks (IL1, IL2; ...
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WO/1997/038157A1 |
The present invention relates to a process for continuously guiding the liquid when digesting pulp in a digester, wherein liquid used in a particular process step can circulate between containers or tanks (IL 1, IL 2; CL1, CL2) arranged ...
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WO/1997/032948A1 |
Perfuming ingredients comprising at least one macrolide of formula (I) having a double bond in one of the positions indicated by the dotted lines and wherein the symbol R represents a hydrogen atom or a methyl radical, are described. The...
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WO/1997/031883A1 |
The invention relates to a process for preparing 1,6 hexane diol and 'epsilon'-caprolacton from a carboxylic acid mixture containing adipic acid, 6-hydroxy caproic acid and, in small quantities, 1,4 cyclohexane diols. Said mixture is obt...
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WO/1997/024346A1 |
The invention relates to a process for the preparation of gamma-butyrolactone by catalytic hydrogenation of maleic acid anhydride, succinic acid anhydride or the acids thereof in the vapour phase in the presence of catalysts based on cop...
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WO/1997/011932A1 |
An improved process for the production of high yields of 'delta'-lactones and 5-hydroxy fatty acids from unsaturated fatty acids which are free or esterified with glycerol is disclosed. The 'delta'-lactones may be produced by reacting on...
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WO/1997/009051A1 |
The present invention provides methods for modulating the interaction between neuregulins and neuregulin-specific glycosaminoglycan sequences. The invention identifies compounds that have the ability to mimic a specific neuregulin-glycos...
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WO/1997/007111A1 |
The invention concerns a process for preparing butyrolactones of general formula (I) in which substituents R1 and R2 stand for hydrogen, alkyl or hydroxyalkyl groups or for aryl and trialkylsilyl groups optionally carrying inert substitu...
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WO/1996/025937A1 |
A composition of matter comprising at least 15 % by weight of the compound: 8-C-'beta'-D-[2-O-(E)-cinnamoyl]glycopyranosyl-2-[(R)-2-hydr
oxy]propyl-7-methoxy-5-methylchromone. This compound, found in very small amounts in leaves of the A...
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WO/1995/022539A1 |
Disclosed is a process for the production of gamma-butyrolactone from maleic anhydride or succinic anhydride by hydrogenation in the presence of a catalyst composition comprising the mixed oxides of copper, zinc and zirconium.
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WO/1995/014010A1 |
The invention pertains to a method for preparing 'gamma'-butyrolactone, wherein 2,5-dihydrofuran or 2,3-dihydrofuran or mixtures of these two hydrofurans are reacted in gas phase, in the presence of water and in the presence or absence o...
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WO/1994/029294A1 |
The present invention relates to a process for producing lactones (1) starting from cyclic ketones which comprises an oxidation reaction which is performed in the presence of an optionally substituted cycloaliphatic peracid or of an opti...
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WO/1994/029258A1 |
A process for producing an omega-functionalized aliphatic carboxylic acid starting from cyclohexanone and omega-functionalized alpha-olefins or acrylic esters. The process comprises an addition step, an oxidation step, an isomerization s...
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WO/1994/021624A1 |
A process for the catalysed oxidation of ketones to esters or lactones with hydrogen peroxide in the presence of a carboxylic acid or anhydride solvent is provided. The process employs gamma alumina as a heterogeneous catalyst. In certai...
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WO/1994/012487A1 |
A process for preparing a lactone of general formula (I), where R is an optionally substituted phenyl group or an optionally substituted mono- or bicyclic heteroaryl radical which process comprises reacting an anion of a malonate of form...
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WO/1994/007887A1 |
The present invention relates primarily to the field of optically active lactones of formula (I) as defined below. The invention relates also to the utilisation of compounds of formula (I) so obtained as perfuming or flavoring ingredient...
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WO/1994/004161A1 |
The activity of inhibitors of vacuolar-type H+-ATPases in the inhibition of vacuolation induced by Helicobacter pylori is disclosed. Preferred agents are the macrolide antibiotics bafilomycins A1, A2, B1, B2, C1, C2 and D, especially baf...
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WO/1993/018652A1 |
Inhibition of renal cancer, melanoma, colon cancer, lung cancer and leukemia cells by administration of compounds from the bafilomycin and hygrolidin groups of compounds.
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WO/1993/018653A1 |
Inhibition of renal cancer, melanoma, colon cancer, lung cancer and leukemia cells by administration of compounds from the bafilomycin and hygrolidin groups of compounds.
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WO/1993/016042A1 |
The invention relates to a process for producing pyrrolidone and N-alkyl pyrrolidones from saturated or unsaturated 1.4-bicarboxylic acids and their anhydrides, hydrogen and a primary amine or ammonia, in which the bicarboxylic acid or i...
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WO/1993/002068A1 |
This invention provides a vapor phase process for the production of gamma-butyrolactone and tetrahydrofuran in a predetermined ratio by the steps of hydrogenating a vapor mixture of maleic anhydride and excess hydrogen over a first bed o...
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WO/1993/002069A1 |
This invention relates to a process for the recovery of purified gamma-butyrolactone (BLO) in high yield from its crude reactor effluent containing BLO, tetrahydrofuran (THF), water, the acid-catalyzed hydrolysis product of BLO which is ...
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WO/1992/014720A1 |
A 4-substituted gamma-lactone is produced by introducing a 1-alkynyl group into the 1-carbon atom of 2,3-O-isopropylidene-D-ribofuranose, cleaving the resulting compound at the diol part to give a lactol, oxidizing it into a lactone, hyd...
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WO/1992/012143A1 |
A process for producing cis-whiskey-lactone represented by formula (A), which is one of the flavoring components of whiskey or wine, selectively and readily, which comprises hydrolyzing the lactone part of trans-whiskey-lactone with pota...
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WO/1992/010487A1 |
A convenient stereoselective process for the preparation of alpha-alkylidene-substituted-gamma-butyrolactones and delta-valerolactones is provided. The process involves reacting an alpha-acyl lactone, an aldehyde, and an alkali metal hyd...
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WO/1992/009590A1 |
Process for the preparation of alpha-alkyl lactones by the steps of first reacting an alpha-acyl lactone, an aldehyde, and an alkali metal hydroxide together to form an alpha-alkylidene lactone, and then hydrogenating the alpha-alkyliden...
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WO/1992/000973A1 |
A process is provided for the production of lactones by the catalytic dehydrogenation of aliphatic diols containing from 3-7 carbon atoms and optionally one or more ether linkages in the diol chain. The reaction is conducted in the liqui...
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WO/1991/016318A1 |
What is provided herein is a vapor phase process for the production of butyrolactone in which the vapor mixture of the feed compound and hydrogen is provided at high flow rates from finely divided droplets of the feed compound which are ...
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WO/1991/016132A1 |
Vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone is achieved in a conversion of 95 % or more and a selectivity of 80 % or more during a prolonged period of production. The process of the invention uses an ac...
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WO/1991/001964A1 |
Carboxylic acid esters are produced from the corresponding C2 to C12 carboxylic acids or anhydrides by hydrogenation at elevated temperature, in the presence of a catalyst comprising (a) an alloy of a Group VIII noble metal and (b) an ox...
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WO/1990/014344A1 |
A method for converting 1,4 and 1,5 aliphatic saturated diols to lactones is disclosed wherein the diol is reacted with a chemical oxidizing agent and a ruthenium containing catalyst at temperatures substantially less than 200°C. The re...
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WO/1990/000431A1 |
The invention relates to a process which comprises treating butyrolactone in at least 95 % purity with an acid to convert and remove color forming impurities for product stabilization.
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WO/1988/000937A1 |
A process for the co-production of butane-1,4-diol and gamma-butyrolactone which comprises: (a) esterifying maleic anhydride by reaction with an alkyl alcohol to form the corresponding dialkyl maleate; (b) hydrogenating resulting dialkyl...
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WO/1986/007358A1 |
Gamma-butyrolactone is produced by vapour phase hydrogenolysis of an alkyl ester of a C4 dicarboxylic acid, e.g. diethyl maleate, over a reduced Cu-Cr or Cu-Zn mixed oxide catalyst. Two adiabatic hydrogenolysis zones are used. The mixtur...
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WO/1983/001072A1 |
Optically active gamma-decalactone is produced by culturing a microorganism capable of hydrolyzing castor oil and effecting beta-oxidation of the resulting hydrolysate in the presence of castor oil or castor oil hydrolysate and a co-oxid...
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JP7334181B2 |
The present disclosure provides novel pladienolide compounds, pharmaceutical compositions containing such compounds, and methods for using the compounds as therapeutic agents. These compounds may be useful in the treatment of cancer, par...
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JP6913031B2 |
[Problem] The present invention addresses the problem of providing a radiation-sensitive composition having excellent LWR, CDU, and EL performance, and a compound and polymer used in the same. [Solution] A polymer having structural units...
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JP5779142B2 |
The invention is directed to the cross-metathesis and ring-closing metathesis reactions between geminal disubstituted olefins and terminal olefins, wherein the reaction employs a Ruthenium or Osmium metal carbene complex. Specifically, t...
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JP5297185B2 |
This invention relates to cationically curable sealants that provide low moisture permeability and good adhesive strength after cure. The composition consists essentially of an oxetane compound and a cationic initiator.
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JP5187929B2 |
Epoxides, aziridines, thiiranes, oxetanes, lactones, lactams and analogous compounds are reacted with carbon monoxide in the presence of a catalytically effective amount of catalyst having the general formula [Lewis acid]{[QM(CO)x]}y...
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JP5156372B2 |
Anthracycline derivatives are suitable for use in cancer therapy and diagnosis. These anthracycline derivatives can be radiolabelled and used as an imaging agent in cancer diagnosis. The radiolabelled anthracycline derivatives can also b...
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JP5026639B2 |
This invention relates to a composition comprising antimony trifluoride and silica, a method for the preparation of said composition and the use of said composition as catalyst. Examples of the silica are hexagonal mesoporous silica (HMS...
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