In vitro evaluation of acyloxyalkyl esters as dermal prodrugs of ketoprofen and naproxen
摘要:
A series of acyloxyalkyl esters of ketoproien and naproxen were synthesized and investigated as topical prodrugs with the aim of improving the dermal delivery of the drugs. In addition, some hydroxyalkyl esters of ketoprofen and naproxen were synthesized as possible intermediates of acyloxyalkyl prodrugs. All of the prodrugs were more lipophilic than their parent molecules, as evaluated by drug partitioning between l-octanol and phosphate buffer at pH 7.4 (log P-app). However, their solubilities in aqueous solutions decreased markedly compared with the parent molecules. The prodrugs were stable toward chemical hydrolysis in aqueous solutions (pH 7.4), but were hydrolyzed to the parent drug both in 80% human serum and in human skin homogenate, with half-lives ranging from 4 to 137 min and from 13 to 403 min, respectively. The abilities of the selected naproxen acyloxyalkyl prodrugs to deliver naproxen through excised human skin were evaluated. Generally, the prodrugs showed similar dermal delivery as the parent drug through cadaver skin. In the present series of lipophilic prodrugs of naproxen, the prodrug with the highest aqueous solubility was the most effective prodrug to deliver naproxen through the skin.
In vitro evaluation of acyloxyalkyl esters as dermal prodrugs of ketoprofen and naproxen
摘要:
A series of acyloxyalkyl esters of ketoproien and naproxen were synthesized and investigated as topical prodrugs with the aim of improving the dermal delivery of the drugs. In addition, some hydroxyalkyl esters of ketoprofen and naproxen were synthesized as possible intermediates of acyloxyalkyl prodrugs. All of the prodrugs were more lipophilic than their parent molecules, as evaluated by drug partitioning between l-octanol and phosphate buffer at pH 7.4 (log P-app). However, their solubilities in aqueous solutions decreased markedly compared with the parent molecules. The prodrugs were stable toward chemical hydrolysis in aqueous solutions (pH 7.4), but were hydrolyzed to the parent drug both in 80% human serum and in human skin homogenate, with half-lives ranging from 4 to 137 min and from 13 to 403 min, respectively. The abilities of the selected naproxen acyloxyalkyl prodrugs to deliver naproxen through excised human skin were evaluated. Generally, the prodrugs showed similar dermal delivery as the parent drug through cadaver skin. In the present series of lipophilic prodrugs of naproxen, the prodrug with the highest aqueous solubility was the most effective prodrug to deliver naproxen through the skin.
[EN] PROCESS FOR THE PREPARATION OF NITRATE ACID ESTER OF ORGANIC COMPOUNDS<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'ESTER D'ACIDE DE NITRATE DE COMPOSÉS ORGANIQUES
申请人:NICOX SA
公开号:WO2012152438A1
公开(公告)日:2012-11-15
The present invention relates to a one-step process for the synthesis of nitric acid esters or 15N isotopically labeled nitrate esters of organic compounds starting from the correspondent alcohols. Formula (I).
Synthesis and in Vitro Evaluation of Novel Morpholinyl- and Methylpiperazinylacyloxyalkyl Prodrugs of 2-(6-Methoxy-2-naphthyl)propionic Acid (Naproxen) for Topical Drug Delivery
作者:Jarkko Rautio、Tapio Nevalainen、Hannu Taipale、Jouko Vepsäläinen、Jukka Gynther、Krista Laine、Tomi Järvinen
DOI:10.1021/jm991149s
日期:2000.4.1
(3a,b) and methylpiperazinylacyloxyalkyl (3c-f) esters of 2-(6-methoxy-2-naphthyl)propionic acid were synthesized and evaluated in vitro for topical drug delivery as potential prodrugs of naproxen (1). Compounds 3a-f were prepared by coupling the corresponding naproxen hydroxyalkyl ester with the morpholinyl- or (4-methyl-1-piperazinyl)acyl acid in the presence of dicyclohexylcarbodiimide (DCC) and 4
[EN] NAPROXCINOD PROCESS AND SOLID DISPERSION<br/>[FR] PROCÉDÉ DE FABRICATION DE NAPROXCINOD ET DISPERSION SOLIDE DE NAPROXCINOD
申请人:REDDYS LAB LTD DR
公开号:WO2009149053A2
公开(公告)日:2009-12-10
Processes for the preparation of naproxcinod and its purification, solid dispersions of naproxcinod with a pharmaceutically acceptable carrier, and processes for making dispersions. Also provided is crystalline 2-(S)-(4-chlorobutyl)-2-(6-methoxy-2-naphthyl)-propanoate and methods for its preparation.
METHOD FOR PURIFYING 4-(NITROOXY)BUTYL(2S)-2-(6-METHOXY-2-NAPHTHYL) PROPANOATE
申请人:Allegrini Pietro
公开号:US20100256411A1
公开(公告)日:2010-10-07
The present invention relates to a method for purifying naproxcinod comprising the steps of:
a) dissolving or dispersing a mixture containing naproxcinod in an amount higher than 90% by weight in a solvent;
b) cooling the solution or two phases dispersion under stirring to a temperature ranging from −20° C. to 10° C.
c) optionally seeding the solution with crystals of naproxcinod
d) stirring, by maintaining the temperature in the range from −40° C. to 10° C.
e) collecting the formed solid by maintaining the temperature under 15° C.
A further object of the invention is a crystalline form of naproxcinod.