Direct β-C(sp<sup>3</sup>)–H Acetoxylation of Aliphatic Carboxylic Acids
作者:Kiron K. Ghosh、Alexander Uttry、Aylin Koldemir、Mike Ong、Manuel van Gemmeren
DOI:10.1021/acs.orglett.9b02741
日期:2019.9.6
strong directinggroups. In our studies, we found that the use of a "traceless base" was crucial for the development of a synthetically useful transformation. Furthermore, the synthetic utility of the products obtained was demonstrated by their use in subsequent transformations.
A new class of co-drugs were synthesised by joining antioxidant edaravone with a vasodilating substructure containing NO-donor nitrooxy functions, and characterised for their stability in different media, lipophilicity and permeability profile. The products display good stability in water/co-solvent at different pH. Conversely, they are rapidly metabolised into edaravone and NO-donor moieties when incubated in human serum or rat-liver homogenates. In the latter conditions time dependent production of nitrite/nitrate (NOx) occurs. The compounds display wide-ranging lipophilicity. PAMPA studies predict good gastrointestinal absorption for a number of these compounds. The title products are potentially useful for treating ROS-related conditions accompanied by decreased NO availability. (C) 2011 Elsevier Ltd. All rights reserved.