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JPS6137777A |
A novel process for the manufacture of the furanone of the formula I is described. In this process, a diol is firstly reacted with thionyl chloride, then the sulphite formed, optionally after oxidation to the corresponding sulphate, is t...
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JPS6122035A |
A process for the production of butane-1,4-diol comprises hydrogenating a di-(C1 to C3 alkyl) ester of a C4 dicarboxylic acid, e.g. an ester of a but-2-en-1,4-dioic acid, such as diethyl maleate, in the vapour phase at a temperature of f...
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JPS61329B2 |
Novel odorants of the formula: NOVEL ODORANTS OF THE FORMULA: (I) where one of the R's is a hydrogen atom and the other is a methyl group and R1 is either the 1- or 2- isobutenyl group.
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JPS60248681A |
The invention relates to a process for preparing 3-methyl-2-butene-4-olide by the codimerization of methylenecyclopropane with carbon dioxide (CO2) in the presence of organic complex compounds of transistion metals, which process is char...
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JPS6043347B2 |
A process for the preparation of tetrahydro-alpha-pyrones comprises preparing the alkyl ester of a 5-oxo alkanoic acid from a 4-oxo alkane carbonitrile, obtained in a first stage by the action of benzyl cyanide on the corresponding alken...
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JPS60104092A |
NEW MATERIAL:A compound shown by the formula I (n is 3,4, or 5; x, y and z are molar ratio of each component). EXAMPLE: A compound shown by the formula II. USE: A polymerizable compound providing a crosslinked polymer having low volume s...
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JPS6038379A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS5953250B2 |
Process for preparing resorcinols from delta -ketocarboxylic acids or their lactones in the gaseous phase at temperatures from 150 DEG 14 500 DEG C by means of a dehydrogenation catalyst.
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JPS5940383B2 |
A process for preparing a brassylic diester of the formula: ROOC-CH2)11COOR wherein R is a lower alkyl group by hydrocracking 6,6'-methylenebis-(6-hexanolide) in an alcohol of the formula: ROH (wherein R is as defined above) in the prese...
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JPS5939512B2 |
The electrolytic reduction of a mixture of an acrylic ester and an aldehyde in the form of an aqueous emulsion in the presence of at least one phase-transfer catalyst using a lead or lead alloy cathode has been found to be very effective...
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JPS5924984B2 |
4-Butyrolactone can be made by reacting an acetate of butanediol with methanol in the vapor phase in the presence of a catalyst mixture comprising magnesia and a copper dehydrogenating agent.
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JPS5984837A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS5829142B2 |
A process for the liquid-phase hydrogenation of maleic anhydride to gamma -butyrolactone in the presence of a catalyst composed of cobalt oxide and palladium on a support of silica.
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JPS5877875A |
1. Process for the production of 3,4-dihydro-alpha-pyrones of the formula see diagramm : EP0075680,P5,F18 wherein R**1 , R**2 and R**3 can be the same or different and stand for hydrogen or alkyl groups with 1 to 10 C-atoms, characterise...
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JPS5819483A |
Cyclopentadecanolide of the formula I I is prepared by a process wherein 12-oxocyclopentadecanolide of the formula II is reduced electrochemically.
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JPS57175188A |
A process for making intermediates of the formula: wherein: Z is phenyl or naphthyl each optionally substituted with up to 3 of the same or different defined substituents, and R is H, (C1-C10), alkyl, (C3-C8)alkenyl, (C3-C8)alkynyl, phen...
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JPS5747896B2 |
1507337 Simultaneous production of caprolactone and carboxylic acids MITSUBISHI CHEMICAL INDUSTRIES Ltd 22 Oct 1975 [23 Oct 1974] 43380/75 Heading C2C An epsilon-caprolactone and a carboxylic acid are produced simultaneously by reacting ...
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JPS5745227B2 |
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JPS57134474A |
Acyloxyhexenoic acids are converted to y-vinyl-y-butyrolactone by elimination of the acyloxy moiety, preferably by heating in the presence of an acid catalyst.
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JPS57126485A |
A process for the manufacture of 2-ethylidenehept-6-en-5-olide which comprises reacting in a liquid medium 1,3-butadiene with carbon dioxide in the presence of a palladium complex catalyst and a tertiary amine.
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JPS5775978A |
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JPS579732A |
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JPS5651021B2 |
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JPS5629643B2 |
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JPS5634677A |
The invention relates to a process for the production of epsilon -caprolactone having a purity of 99.9% and increased color and storage stability which comprises feeding epsilon -caprolactone, which has been made by reacting cyclohexanon...
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JPS568380A |
A quaternary ammonium salt of an ester-lacetone represented by the formula in which w represents 0 or 1, x and y alternately represent 0 and 1, z has value from 0 to 4, Ri, Rii, Riii and Riv, in instances where w is equal to 0, represent...
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JPS55154969A |
Caprolactones such as epsilon -caprolactone are stabilized against discoloration with dihydroxybenzenes such as hydroquinone or compounds of the formula in which R1 is alkyl of 1 to 8 carbon atoms, and R2 is hydrogen or alkyl of 1 to 8 c...
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JPS55154968A |
A process for the preparation of epsilon -caprolactone comprising: (a) reacting cyclohexanone with a solution of perpropionic acid in an organic solvent at a molar ratio of cyclohexanone;perpropionic acid of about 1.1-5:1 at a temperatur...
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JPS5544750B1 |
1384605 Pivalolactone HOECHST AG 8 June 1972 [8 June 1971] 26779/72 Heading C2C Pivalolactone (α,α - dimethyl - # - propiolactone) is prepared by thermally splitting acetic acid from #-acetoxy-pivalic acid in the presence of a catalyst...
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JPS55141480A |
Butyrolactone is produced by oxidizing an aldehyde-ether of the general formula: (I) wherein R1 and R2 each, independently of the other, represent a C1 to C4 alkyl radical, and R3 and R4 each, independently of the other, represent a hydr...
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JPS5512907B2 |
A perfluorolactone having the formula wherein n is an integer of 2 to 4, is produced by reacting a fluoro compound having the formula I(CF2)n COX wherein n is an integer of 2 to 4 and X represents a halogen atom, -OR or -NR1R2, and R, R1...
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JPS5512432B2 |
1385807 Purification of α,α-disubstituted-#- propiolactones EASTMAN KODAK CO 14 Dec 1972 [16 Dec 1971] 57880/72 Heading C2C Impure α,α-disubstituted-#-propiolactones of formula where R and R1 are straight- or branched-chain C 1 to C ...
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JPS5441560B2 |
An aliphatic gamma-dicarboxylic compound which is a precursor for hydrogenation into a corresponding gamma-butyrolactone is caused to contact hydrogen in the presence of a hydrogenation catalyst prepared by intimately combining nickel, m...
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JPS5438108B2 |
A process for preparing a gamma -lactone derivative having the formula (I) R7R3R4R5 ¦¦¦ ANGLE C= C- C-- C-R6 (I) ¦¦ R8CHO ¦ ANGLE R7C PARALLEL O wherein R1, R2, R3, R4, R5 and R6, which may be the same or different, each represents...
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JPS5459294A |
A process is provided for the continuous or semi-continuous production of hetero-macrocyclic compounds including lactones and cyclic esters. The process involves the catalyzed depolymerization of a linear polyester at an elevated tempera...
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JPS5459222A |
Octadienyl esters of 2-ethylidene-hepta-3,5-dienoic and 2-vinyl-hepta-3,5-dienoic acids of formula C8H11COOC8H13 and delta -lactone of formula (II) or 2-ethylidene-hepta-6-ene-5-olide, are prepared by reaction of 1,3-butadiene with CO2 a...
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JPS548677B1 |
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JPS5436207A |
2-ALKOXYTETRAHYDROFURANS ARE CONVERTED TO 1,4-DIOLS UNDER HYDROLYSIS-HYDROGENATION CONDITIONS. The method may be coupled with the synthesis of 2-alkoxytetrahydrofurans to provide a highly efficient, two-step conversion of allylic alcohol...
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JPS5312851A |
Phenoxypropanolamines of formula (I) and their pharmaceutically acceptable acid addition salts are new: (m=0-3; (=2 or 3; R1=H, lower alkyl or cycloalkyl; R2 and R3 are each opt. branched lower alkyl, dimethoxylphenethyl or phenylisoprop...
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JPS52136102A |
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JPS5239034B2 |
1413475 Cyclic esters (lactones) BURMAH OIL TRADING Ltd 31 Oct 1972 [5 Nov 1971] 51563/71 Heading C2C Cyclic esters (lactones) are prepared by reacting a cyclic ketone containing 5 or 6 carbon atoms and a hydroperoxide having the general...
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JPS5277052A |
Gamma-butyrolactones are manufactured from olefins by reacting an olefin with an aldehyde to produce a 1,3-difunctional compound, reacting the 1,3-difunctional compound with carbon monoxide, and thereafter recovering the lactone thus pro...
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JPS5221517B2 |
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JPS5268172A |
gamma -BUTYROLACTONE, WHICH IS AN IMPORTANT PRELIMINARY PRODUCT FOR THE PREPARATION OF BUTANEDIOL-(1,4) AND OF PYRROLIDONE, IS MANUFACTURED BY CATALYTIC HYDROGENATION OF MALEIC ACID, MALEIC ACID ANHYDRIDE, SUCCINIC ACID, SUCCINIC ACID AN...
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JPS5218197B1 |
1,203,752. Lactones. LAPORTE CHEMICALS Ltd. 18 Sept., 1967 [30 Sept., 1966], No. 43880/66. Heading C2C. Lactones are prepared by reacting the liquid obtained by condensing a vapour mixture containing a peroxy carboxylic acid having up to...
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JPS5210254A |
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JPS5195057A |
A continuous process for producing gamma-butyrolactone by hydrogenating maleic anhydride in two stages in the presence of a catalyst composed of cobalt oxide and palladium on a support of silica. The hydrogenation is performed at a hydro...
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JPS5125032B2 |
1346705 Sulphonylaminopyrimidines BOEHRINGER MANNHEIM GmbH 16 Oct 1972 [20 Oct 1971] 47608/72 Heading C2C Novel sulphonylaminopyrimidines of Formula where A is a bicyclic oxygen or sulphur containing heterocycle, optionally substituted b...
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JPS5175009A |
A process for the manufacture of 1,4-butanediol and/or tetrahydrofuran, wherein maleic acid or succinic acid is used as the starting material, butyrolactone is produced in defined stages and is hydrogenated to butanediol or tetrahydrofur...
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JPS5168546A |
Cyclohexane-1,3-diones of the formula having up to 24 carbon atoms are prepared in admixture with 6-alkyl-3,4-dihydro-2-pyranones of the formula having up to 24 carbon atoms, in which formulae the radicals R and R' may be identical or di...
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