摘要:
Novel 4-methyl-3-formyl-pentanoic acid derivative of the formula ##STR1## wherein Hal is a halogen, R.sub.1 is alkyl of 1 to 12 carbon atoms and A and B are .dbd.0 or A is halogen and B is --OR.sub.2 and R.sub.2 is alkyl of 1 to 12 carbon atoms, their preparation and their use as intermediates.
摘要:
A process for the production of a 3,3-dimethyl-2-formylcyclopropanecarboxylic acid derivative of formula (2): wherein R is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl, which process comprises reacting a 3,3-dimethyl-2-(2-methyl-1-propenyl)cyclopropanecarboxylic acid compound of formula (1): wherein R is as defined above, with a periodic acid compound in the presence of a ruthenium compound.
摘要:
METHACRYLIC ACID ESTERS AND NITRIEL ARE HYDROFORMYLATED IN THE PRESENCE OF A RHODIUM CATALYST. A-FORMYL PRODUCTS PREDOMINATE WHEN REACTING BELOW 100*C. AND B-FORMYL PRODUCTS PREDOMINATE WHEN REACTING ABOVE 100*C.
摘要:
A process for the production of a 3,3-dimethyl-2-formylcyclopropanecarboxylic acid derivative of formula (2): wherein R is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl, which process comprises reacting a 3,3-dimethyl-2-(2-methyl-1-propenyl)cyclopropanecarboxylic acid compound of formula (1): wherein R is as defined above, with a periodic acid compound in the presence of a ruthenium compound.
摘要:
2,2-Dimethyl-3-((oxyimino)methyl)cyclopropanecarboxylic acids are prepared by treating the mixed anhydride of acetic and caronaldehydic acids with an acid addition salt of a hydroxylamine or of a hydrocarbyloxylamine followed by hydrolysis of the oxyimino-substituted product thereby obtained.
摘要:
A novel process for the preparation of compounds of the formula ##STR1## with cis or trans structure in racemic or optically active form wherein R is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and aryl of 6 to 12 carbon atoms comprising reacting an optically active isomer, or racemate of the formula ##STR2## wherein R has the above definition and the way line indicates Z or E geometry with a gem-dimethyl cyclopropanation agent if there is Z geometry to obtain a compound of the formula ##STR3## or if the geometry is E with a gem-dimethyl cyclopropanation agent other than isopropylidene triphenyl phosphorane to obtain a compound of the formula ##STR4## wherein R has the above definition and the cyclopropane ring has the trans configuration and either hydrolyzing the compound of formula III or IIIa to obtain a compound of the formula ##STR5## and then cleaving the 4,5 bond to obtain the corresponding compound of formula I or simultaneously cleaving the 4,5 bond and hydrolyzing the dioxolane group to obtain the corresponding compound of formula I and novel intermediates.
摘要:
A series of alkanoarachidonic acids have been prepared as modulators of the arachidonic acid cascade to increase the production of biologically desirable compounds and minimize the production of biologically undesirable compounds. Examples of desirable compounds in this respect comprise postaglandins and thromboxanes whereas undesirable compounds comprise the mono- and polyhydroxyarachidonic acids and leukotrienes. The alkanoarachidonic acids and their intermediates are of the general formula: ##STR1## and at least one of X, Y, and Z is lower alkano and is hydrogen when not lower alkano; the esters and salts of the acids are also prepared. The acids, esters and salts may be used as anti-anaphylaxis or anti-thrombosis agents.
摘要:
Novel 4-methyl-3-formyl-pentanoic acid derivative of the formula ##STR1## wherein Hal is a halogen, R.sub.1 is alkyl of 1 to 12 carbon atoms and A and B are .dbd.O or A is halogen and B is --OR.sub.2 and R.sub.2 is alkyl of 1 to 12 carbon atoms, their preparation and their use as intermediates.
摘要:
A process for the preparation of caronaldehyde acid or a derivative thereof of the formula ##STR1## in which R is O.sup.- Me.sup.+, or OH, andMe.sup.+ is an equivalent of an alkali metal, alkaline earth metal or ammonium cation, comprising reacting a 2-halogeno-3,3-dimethyl-5,5-dichloropentanoic acid halide of the formula ##STR2## wherein X and Y each independently is a halogen atom, with a base in the presence of water.
摘要:
BY REACTING 3,3-DIMETHYL-2-FORMYL-1-CYCLOPROPANECARBOXYLIC (1R, 2R) acid or a salt thereof with methyl propionate under anhydrous basic conditions.
A novel process for the preparation of 3,3-dimethyl-2-(2''methoxycarbonyl-trans 1''-propenyl)-1-cyclopropane carboxylic (1R, 2R) acid or d-trans pyrethric (1R,2R) acid of the formula