| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 560121000 | Cyclopentyl in acid moiety (e.g., prostaglandins, etc.) | 6 |
| 20090093651 | PROCESS FOR PREPARATION OF 13,14-DIHYDRO-PGF2 ALPHA DERIVATIVES - The invention relates to a process for the preparation of 13,14-dihydro-PGF | 04-09-2009 |
| 20150126764 | METHOD FOR THE PURIFICATION OF PROSTAGLANDINS - The present invention provides a method for the purification of a prostaglandin by supercritical fluid chromatography, said method comprising the use of a stationary phase and a mobile phase comprising carbon dioxide, provided that when the stationary phase is unmodified silica gel, the prostaglandin is not luprostiol. The invention also provides prostaglandins obtainable by the method. | 05-07-2015 |
| 560122000 | Cyclopentyl-COOR, -C-COOR or -C-C-COOR | 4 |
| 20090299088 | PROCESSES AND INTERMEDIATES FOR THE PREPARATIONS OF PROSTAGLANDINS - The present invention provides novel processes for the preparation of a cyclopentanone of Formula II and a lactone of Formula I, which are useful in the production of prostaglandins: | 12-03-2009 |
| 20110034722 | METHOD FOR PRODUCING OF 2-ALKYL-2-CYCLOALKEN-1-ONE - The present invention relates to [1] a process for producing a 2-alkyl-2-cycloalken-1-one represented by the following general formula (2), which includes the step of subjecting a 2-(1-hydroxyalkyl)cycloalkan-1-one to dehydration and isomerization in the co-existence of an acid and a platinum group metal catalyst, and [2] a process for producing an alkyl(3-oxo-alkylcycloalkyl)acetate which is useful as a perfume material, using the 2-alkyl-2-cycloalken-1-one: | 02-10-2011 |
| 20110152565 | Method for making a phosphorus ylide - The method for making a phosphorus ylide produces the ylide 2,3-bismethoxycarbonyl-4-phenyl-5-arylhydrazono-cyclopenta-1,3-dienyl-triphenylphosphonium in pure form by simple recrystallization of the reaction product. 3-Oxo-3-phenyl-2-(arylhydrozono)propanal and dimethylacetylenedicarboxylate are mixed in dichloromethane at room temperature. After cyclization of the intermediate (preferably at least two hours), triphenylphosphine is added to the mixture, ultimately resulting in formation of 2,3-bismethoxycarbonyl-4-phenyl-5-arylhydrazono-cyclopenta-1,3-dienyl-triphenylphosphonium. The product is recrystallized to produce 2,3-bismethoxycarbonyl-4-phenyl-5-arylhydrazono-cyclopenta-1,3-dienyl-triphenylphosphonium in pure form and in high yield. The aryl group may be any aromatic or aliphatic group. | 06-23-2011 |
| 20140378698 | Method for preparation of (2-hydroxy-3-oxo-cyclopent-1-enyl)-acetic acid esters - The invention relates to the method of preparation of compounds of formula I, the precursors of homocitric acid lactone and its salts, by coupling of the compounds of formula II with bromoacetic acid esters of formula III. | 12-25-2014 |
