| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549328000 | Four-membered lactone ring formed | 9 |
| 20090171104 | PROCESS FOR THE PREPARATION OF ORLISTAT - The present invention provides a process for preparing orlistat (I) by alkanoylating an amino orlistat using formic acid anhydride as an alkanoylating agent to obtain orlistat substantially free of the byproduct, (S)-N-acetylleucine (1S)-1-[[(2S, 3S)-3-hexyl-4-oxo-2-oxetanyl]methyl] dodecyl ester (deformyl-N-acetyl orlistat). | 07-02-2009 |
| 20100179335 | PROCESS FOR THE PREPARATION OF ORLISTAT - The present invention provides a process for preparing orlistat from amino orlistat using Pivaloyl Formic Anhydride (PFA) as an alkanoylating agent. | 07-15-2010 |
| 20110046400 | PREPARATION METHOD OF (3S,4S)-3-HEXYL-4-((R)-2-HYDROXYTRIDECYL)-OXETAN-2-0NE AND THE PRODUCT OF THAT METHOD - The present invention relates to a method for the preparation of (3S,4S)-3-hexyl-4-((R)-2-hydroxytridecyl)-oxetan-2-one and a product of the method. The method includes the following steps: a) reducing a substance represented by formula (II) to obtain a substance represented by formula (III), and then oxidizing the substance represented by formula (III) to form a substance represented by formula (IV); b) acylating n-octanoic acid to obtain n-octanoyl chloride using thionyl dichloride, then condensing the obtained n-octanoyl chloride with 2-mercapto-pyridine under basic condition to form a substance represented by formula (V), and then converting the substance represented by formula (V) to a substance represented by formula (VI); c) reacting the substance obtained in the step a) with the substance obtained in the step b) under catalytic condition of Lewis acid to generate a substance represented by formula (VII), and then reacting with a Lewis acid. The meanings of the signs in these formulas are the same as those in the description. | 02-24-2011 |
| 20110282075 | METHOD FOR PREPARING VITTATALACTONE - The present invention relates to the chemical synthesis of vittatalactone, the aggregation pheromone of the striped cucumber beetle, | 11-17-2011 |
| 20120022274 | Crystalline Form of Orlistat and a Process Thereof - The present disclosure provides a crystalline form of orlistat, particularly form A of orlistat. The characterization of said form is performed using X-ray diffraction studies, IR and Differential Scanning calorimetry melting endotherm studies. Also, the disclosure provides a simple process to arrive at said crystalline form. | 01-26-2012 |
| 20120123137 | PROCESS FOR BETA-LACTONE PRODUCTION - The present application provides a method for producing an beta-lactone product. The method includes the steps of: reacting an epoxide, a solvent with a carbonylation catalyst and carbon monoxide to produce a reaction stream comprising a beta-lactone then separating a portion of the beta-lactone in the reaction stream from the solvent and carbonylation catalyst to produce: i) a beta-lactone stream with the beta-lactone, and ii) a catalyst recycling stream including the carbonylation catalyst and the high boiling solvent; and adding the catalyst recycling stream to the feed stream. | 05-17-2012 |
| 20130281715 | PROCESS FOR BETA-LACTONE PRODUCTION - The present application provides a method for producing an beta-lactone product. The method includes the steps of: reacting an epoxide, a solvent with a carbonylation catalyst and carbon monoxide to produce a reaction stream comprising a beta-lactone then separating a portion of the beta-lactone in the reaction stream from the solvent and carbonylation catalyst to produce: i) a beta-lactone stream with the beta-lactone, and ii) a catalyst recycling stream including the carbonylation catalyst and the high boiling solvent; and adding the catalyst recycling stream to the feed stream. | 10-24-2013 |
| 20140275575 | PROCESS FOR BETA-LACTONE PRODUCTION - The present application provides a method for producing an beta-lactone product. The method includes the steps of: reacting an epoxide, a solvent with a carbonylation catalyst and carbon monoxide to produce a reaction stream comprising a beta-lactone then separating a portion of the beta-lactone in the reaction stream from the solvent and carbonylation catalyst to produce: i) a beta-lactone stream with the beta-lactone, and ii) a catalyst recycling stream including the carbonylation catalyst and the high boiling solvent; and adding the catalyst recycling stream to the feed stream. | 09-18-2014 |
| 549329000 | From a ketene (HCH=C=O, wherein H may be substituted) | 1 |
| 20120022275 | PROCESS FOR THE PRODUCTION OF CARNITINE BY CYCLOADDITION - The invention relates to a method for the production of L-carnitine, wherein a chiral β-lactone carnitine precursor is obtained by a [2+2] cycloaddition of ketene with an aldehyde X—CH | 01-26-2012 |
