Scheme 3. Syntheses of Negative Control Compounds 42–43a.
aReaction conditions: (a) EDCI, HOAt, NMM, DMSO, rt, 12 h; (b) TFA, DCM, rt, 30 min; and (c) N-methyl-2-pyrrolidone (NMP), diisopropylethylamine (DIPEA), MW, 100 °C, 1 h.
aReaction conditions: (a) EDCI, HOAt, NMM, DMSO, rt, 12 h; (b) TFA, DCM, rt, 30 min; and (c) N-methyl-2-pyrrolidone (NMP), diisopropylethylamine (DIPEA), MW, 100 °C, 1 h.