Abstract:
4,5-DISUBSTITUTED-3-HYDROXYCYCLOPENTANONES (I) ARE PREPARED BY HYDROGENOLYZING THE CORRESPONDING 4,5-DISUBSTITUTED-2,3-EPOXYCYCLOPENTANONE (IV) WHICH IN TURN IS PROVIDED BY REACTING THE CORRESPONDING 4,5-DISUBSTITUTED2-CYCLOPENTEN-1-ONE (111) WITH ALKINE HYDROGEN PEROXIDE. COMPOUNDS (111) ARE PREPARED BY CYCLIZING THE CORRESPONDING 2,3-DISUBSTITUTED LEVULINALDEHYDE (11) WITH A BASE. THE PRODUCTS OF THE PROCESS ARE BIOLOGICALLY ACTIVE, ESPECIALLY COMPOUND (1) SUBSTITUTED IN THE 4-POSITION WITH 3'', -HYDROXYOCTYL AND IN THE 5-POSITION WITH 6'' -CARBOXYHEXYL. THIS COMPOUND HAS PROSTAGLANDIN-LIKE ACTIVITY, ACTIVITY BLOOD PRESSURE LOWERING AND BRONCHODILATOR E1ESPEACTIVITY, AND IS A TOTALLY-SYNTHETIC DIHYDROPROSTAGLANDIN E1 (DIHYDRO PGE1). THE PROCESSES OF THE INVENTION MAY ALSO BE USED TO OBTAIN COMPOUNDS WITH PROSTAGLANDINLIKE ACTIVITY FROM APPROPRIATELY SUBSTITUTED NATURALLY OCCURRING CYCLOPENTANONES, E.G. THOSE ISOLATED FROM THE CARIBBEAN GORGONIAN, PLEXAURA HOMOMALLA.
Abstract:
The invention belongs to the pharmaceutical manufacturing field, which relates to a novel process for the preparation of substituted phenylacetic acids derivatives, especially relates to the preparation of 2-(4-(2-oxocyclopentyl)phenyl)propanoic acid. The process for the preparation of the precursor form of loxoprofen which use 1,4-di-halobenzyl compounds or disubstituted benzyl compounds as starting material, is through the substitution reaction of cyclopentanone groups or its precursor compounds. Wherein X is halogen, L1 is a suitable leaving group selected from halogen, OH, OMs, OTs, OTf and the like; L2 is a suitable leaving group selected from halogen, CN, OH, —CH2OH, —CHO, CH3NO2, ester group, —NR4R5, OTf, OTs, OMs, —C═CR6, —C≡CR7 and the like, wherein R4, R5, R6, R7 are short chain alkyl groups; Z is cyclopentanone group and its precursor form selected from and the like; R3 is short chain alkyl groups. L3 is a suitable leaving group selected from halogen, OH, OMs, OTs, OTf and the like, or organometallic groups. The invention also include the detailed procedure to convert the precursor compounds of cyclopentanone group to cyclopentanone, followed by the transformation of the precursor compounds of loxoprofen to loxoprofen.
Abstract:
A compound of Formula (I): or a metabolite thereof, or an ester of the compound of Formula (I) or the metabolite thereof, or a pharmaceutically acceptable salt of each thereof, wherein m, n, X1 and X2 are as defined herein, is useful for treating non-alcoholic fatty liver disease (NAFLD) or non-alcoholic steatohepatitis (NASH).
Abstract:
The present invention relates to a process for the preparation of a composition comprising tartaric acid wherein between 55 and 90% by weight of the tartaric acid is meso-tartaric acid, comprising the steps of (i) preparing an aqueous mixture comprising between 35 and 65% by weight of a di-alkali metal salt of L-tartaric acid, a di-alkali metal salt of D-tartaric acid, a mixture of di-alkali metal salts of L-tartaric acid, D-tartaric acid, and optionally meso-tartaric acid, and between 2 and 15% by weight of an alkali metal or alkaline metal hydroxide, and (ii) stirring and heating the aqueous mixture to a temperature of between 100° C. and its boiling point until between 55 and 90% by weight of tartaric acid has been converted to meso-tartaric acid.
Abstract:
2-Formyl-3-protected hydroxy-5-oxocyclopent-1-eneheptanoic acid and its esters are stereoselectively reduced to the corresponding 2.beta.-formyl-3.alpha.-protected hydroxy-5-oxocyclopentane-1.alpha.-heptanoic acid and esters with chromous sulfate. The compounds so produced are useful as intermediates to PGE.sub.1 and its esters, which compounds exhibit hypotensive and smooth muscle-stimulating properties.
Abstract:
THE CONDENSATION OF DIMETHYL 3-OXOUNDECANE-1,11-DIOATE WITH STYRYLGLYOXAL AFFORDS 14-PHENYL-9,12-DIOXO-11HYDROXYTETRADEC-13-ENOIC ACID, WHICH IS CYCLIZED TO AFFORD 3-HYDROXY-5-OXO-2-STYRYLCYLOPENT - 1 - ENEHEPTANOIC ACID. HYDROXYLATION OF THE STYRYL DOUBLE BOND AFFORDS THE CORRESPONDING 2-STYRYL-3-HYDROXY COMPOUNDS RE RESOLVED AND IS CLEAVED TO AFFORD THE INSTANT 2-FORMYL COMPOUNDS. THE RACEMIC 2-STYTYL-3-HYDROXY COMPOUNDS ARE RESOLVED AND SUBSEQUENTLY HYDROXYLATED AND CLEAVED TO FORM THE OPTICALLY ACTIVE 2-FORMYL DERIVATIVES. THE INSTANT COMPOUNDS ARE USEFUL AS ANTI-MICROBIAL AGENTS AND ALSO AS INTERMEDIATES TO PROSTANOIC ACID DERIVATIVES AND THEIR OPTICALLY ACTIVE ISOMERS WHICH EXHIBIT ANTI-MICROBIAL, PEPSIN-INHIBITORY, HYPOTENSIVE AND SMOOTH MUSCLE-CONTRACTING PROPERTIES.
Abstract:
The present invention discloses a crystalline form of the (R)-2-(tert-butylamino)-1-(5-fluoropyridin-3-yl)ethanol (formula (I)) hemi-(2R,3R)-tartrate salt characterised by a melting point of 211° C. and the XRPD pattern of FIG. 1. The present invention also relates to said hemi-tartrate salt for use in the treatment of hyperglycaemia and type 2 diabetes through activation of the beta2-adrenergic receptor. Importantly, such salts are thought to have a beneficial side-effect profile as they do not exert their effect through significant cAMP release.
Abstract:
4,5-DISUBSTITUTED - 3 - HYDROXYCYCLOPENTANONES (I) ARE PREPARED BY HYDROGENOLYZING THE CORRESPONDING 4,5-DISUBSTITUTED-2,3-EPOXYCYCLOPENTANONE (IV) WHICH IN TURN IS PROVIDED BY REACTING THE CORRESPONDING 4,5 - DISUBSTITUTED-2-CYCLOPENTEN-1-ONE (III) WITH ALKALINE HYDROGEN PEROXIDE. COMPOUNDS (III) ARE PREPARED BY CYCLIZING THE CORRESPONDING 2,3-DISUBSTITUTED LEVULINALDEHYDE (II) WITH A BASE. THE PRODUCTS OF THE PROCESS ARE BIOLOGICALLY ACTIVE, ESPEICALLY COMPOUND (I) SUBSTITUTED IN THE 4-POSITION WITH 3'':HYDROXYOCTYL AND IN THE 5-POSITION WITH 6''CARBOXYHEXYL. THIS COMPOUND HAS PROSTAGLANDIN-LIKE ACTIVITY, ESPECIALLY BLOOD PRESSURE LOWERING AND BROCHODILATOR ACTIVITY, AND IS A TOTALLY-SYNTHETIC DIHYDROPROSTAGLANDIN E1(DIHYDRO PGE1). THE PROCESSES OF THE INVENTION MAY ALSO BE USED TO OBTAIN COMPOUNDS WITH PROSTAGLANDIN-LIKE ACTIVITY FROM APPROPRIATELY SUBSTITUTED NATURALLY OCCURRING CYCLOPENTANONES, E.G. THOSE ISOLATED FROM THE CARIBBEAN GORGONIAN, PLEXAURA HOMOMALLA.
Abstract:
4,5-DISUBSTITUTED-3-HYDROXYCYCLOPENTANONES (I) ARE PREPARED BY HYDROGENOLYZING THE CORRESPONDING 4,5-DISUBSTITUTED-2,3-EPOXYCYCLOPENTANONE (IV) WHICH IN TURN IS PROVIDED BY REACTING THE CORRESPONDING 4,5-DISUBSTITUTED2-CYCLOPENTEN-1-ONE (III) WITH ALKALINE HYDROGEN PEROXIDE. COMPOUNDS III ARE PREPARED BY CYCLIZING THE CORRESPONDING 2,3-DISUBSTITUTED LEVULINALDEHYDE (II) WITH A BASE. THE PRODUCTS OF THE PROCESS ARE BIOLOGICALLY ACTIVE, ESPECIALLY COMPOUND I SUBSTITUTED IN THE 4-POSITION WITH 3''-HYDROXYOCTYL AND IN THE 5-POSITION WITH 6''-CARBOXYHEXYL. THIS COMPOUND HAS PROSTAGLANDIN-LIKE ACTIVITY, ESPECIALLY BLOOD PRESSURE LOWERING AND BRONCHODILATOR ACTIVITY, AND IS A TOTALLY-SYNTHETIC DIHYDROPROSTAGLANDIN E1 (DIHYDRO PGE1). THE PROCESS OF THE INVENTION MAY ALSO BE USED TO OBTAIN COMPOUNDS WITH PROSTAGLANDIN-LIKE ACTIVITY FROM APPROPRIATELY SUBSTITUTED NATURALLY OCCURRING CYCLOPENTANONES, E.G. THOSE ISOLATED FROM THE CARIBBEAN GORGONIAN, PLEXAURA HOMOMALLA.