Reported herein are the design, synthesis, and Grb2 SH2 domain-binding affinities of several phosphoryl-mimicking groups displayed within the context of a conformationally constrained macrocyclic platform. With use of surface plasmon resonance techniques, single- digit nanomolar affinities were exhibited by phosphonic acid and malonyl-containing diacidic phosphoryl mimetics (for 4h and 4g, KD= 1.47 and 3.62 nM, respectively). ...
