posted on 2020-03-31, 12:33authored byAmanda W. Dombrowski, Nathan J. Gesmundo, Ana L. Aguirre, Katerina A. Sarris, Jonathon M. Young, Andrew R. Bogdan, M. Cynthia Martin, Shasline Gedeon, Ying Wang
Despite
recent advances in the field of C(sp2)–C(sp3) cross-couplings and the accompanying increase in publications,
it can be hard to determine which method is appropriate for a given
reaction when using the highly functionalized intermediates prevalent
in medicinal chemistry. Thus a study was done comparing the ability
of seven methods to directly install a diverse set of alkyl groups
on “drug-like” aryl structures via parallel library
synthesis. Each method showed substrates that it excelled at coupling
compared with the other methods. When analyzing the reactions run
across all of the methods, a reaction success rate of 50% was achieved.
Whereas this is promising, there are still gaps in the scope of direct
C(sp2)–C(sp3) coupling methods, like
tertiary group installation. The results reported herein should be
used to inform future syntheses, assess reaction scope, and encourage
medicinal chemists to expand their synthetic toolbox.