Polyethylene glycol derivatization of the non-active ion in active pharmaceutical ingredient ionic liquids enhances transdermal delivery

Autor: Giovanni P. Rachiero, Robin D. Rogers, Parker D. McCrary, Hatem M. Titi, Julia L. Shamshina, Max S. Mittenthal, Oleksandra Zavgorodnya
Rok vydání: 2017
Předmět:
Zdroj: New Journal of Chemistry. 41:1499-1508
ISSN: 1369-9261
1144-0546
DOI: 10.1039/c6nj03709g
Popis: We report the synthesis of four salts composed of the salicylate anion ([Sal]−) paired with tributylammonium ([HN444]+), choline ([Cho]+), 1-methylpyrrolidinium ([HMPyrr]+), and triethylene glycol monomethyl ether tributylammonium ([mPEG3N444]+) cations. Three of the synthesized salts (room temperature liquids [mPEG3N444][Sal] and [Cho][Sal], and a supercooled liquid [HN444][Sal]) belong to the category of ionic liquids (ILs), and one salt (solid [HMPyrr][Sal]) was a crystalline solid. ILs in their neat form were studied for membrane transport through a silicon membrane, and exhibited higher transport compared to a control experiment with sodium salicylate dissolved in mPEG3OH as solvent, but lower membrane transport compared to salicylic acid dissolved in mPEG3OH. The ‘PEGylated’ IL, [mPEG3N444][Sal], crossed the membrane with an ca. ∼2.5-fold faster rate than that of any of the non-PEGylated ILs. This work demonstrates not only that API–ILs can eliminate the use of a solvent vehicle during application and notably transport through a membrane as opposed to a higher melting crystalline salt, but also that the membrane transport can be further enhanced by PEGylation of the counter ions.
Databáze: OpenAIRE