The present invention provides an ion pair compound of the formula [narcotic]
+
[A]
−
, wherein [narcotic]
+
represents at least one cation of at least one narcotic agent or one or more stereochemical isomers thereof and [A]
−
represents at least one anion of at least one NSAID or one or more stereochemical isomers thereof. An example of the ion pair compound is propoxyphene diclofenate. The ion pair compounds, or their pharmaceutical compositions, are useful in methods of treating a wide variety of conditions that indicate analgesics, anti-inflammatory agents, or both. Under the conditions prescribed for their use, the ion pair compounds exhibit poor or complete insolubility but excellent chemical stability in low pH environments, such as those found in the stomach. The ion pair compounds readily dissolve and dissociate in higher pH environments such as the small intestine to release the constituent narcotic and NSAID.
[EN] PRODRUGS OF KETAMINE, COMPOSITIONS AND USES THEREOF<br/>[FR] PROMÉDICAMENTS À BASE DE KÉTAMINE, COMPOSITIONS ET UTILISATIONS DE CEUX-CI
申请人:XW LAB INC
公开号:WO2019137381A1
公开(公告)日:2019-07-18
Provided are prodrugs of (S) -or (R) -ketamine, including isotopically labeled ketamine,composition and uses thereof. Compounds having formula (Ia) or (Ib) as the prodrugs of (S) -or (R) -ketamine, including isotopically labeled ketamine, and pharmaceutical compositions comprising the compounds provided herein are used for treating or preventing a CNS disease.More particularly, the related diseases include depression and pain. (Ia) (Ib)
Subsequently, racemization of the unwanted (R)-1a remained in resolution mother liquor was performed in the presence of a Lewis acid in quantitative yield with >99.0% chemical purity. This original and economical process afforded esketamine in 67.4% (28.9% without racemization) overall yield with two times recycling of the mother liquor without column purification. In addition, this procedure can also be
[EN] (S)-CSA SALT OF S-KETAMINE, (R)-CSA SALT OF S-KETAMINE AND PROCESSES FOR THE PREPARATION OF S-KETAMINE<br/>[FR] SEL (S)-CSA DE S-KÉTAMINE, SEL (R)-CSA DE S-KÉTAMINE ET PROCÉDÉS PERMETTANT LA PRÉPARATION DE S-KÉTAMINE
申请人:CHEN CHENG YI
公开号:WO2016180984A1
公开(公告)日:2016-11-17
The present invention is directed to processes for the preparation of esketamine. The present invention is further directed to processes for the resolution of S-ketamine from a racemic or enantiomerically enriched mixture of ketamine. The present invention is further directed to an (S)-CSA salt of S-ketamine, more particularly a monohydrate form of the (S)-CSA salt of S-ketamine; and to an (R)-CSA salt of R-ketamine.
The invention is directed to a method of treatment for pain, the method comprising administering to a mammal in need of such treatment a therapeutically effective amount of a compound of formula I, or a pharmaceutically acceptable salt thereof.