A New Photolabile Protecting Group for Release of Carboxylic Acids by Visible-Light-Induced Direct and Mediated Electron Transfer was written by Borak, J. Brian;Falvey, Daniel E.. And the article was included in Journal of Organic Chemistry in 2009.Formula: C7H6N2 This article mentions the following:
A new aqueous-compatible photoinduced electron transfer based photolabile protecting group, namely, (2-cyano-N-methyl-4-pyridinio)methoxy group, has been developed for the release of carboxylic acids from their esters. The reduction potential of this group is more pos. than previous systems, thereby allowing the use of sensitizers with modest oxidation potentials. Release of several carboxylic acids has been demonstrated using tris(bipyridyl)ruthenium(II) as both a direct sensitizer and a mediator for electron transfer between a good donor and the protecting group. In the experiment, the researchers used many compounds, for example, 4-Methylpicolinonitrile (cas: 1620-76-4Formula: C7H6N2).
4-Methylpicolinonitrile (cas: 1620-76-4) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Formula: C7H6N2