4-((trimethylsilyl)ethynyl)benzene-1,2-diamine

tert-butyl (S)-6-((2-amino-4-((trimethylsilyl)ethynyl)phenyl)carbamoyl)-5-azaspiro[2.4]heptane-5-carboxylate

(S)-tert-butyl 6-(6-((trimethylsilyl)ethynyl)-1H-benzo[d]imidazol-2-yl)-5-azaspiro[2.4]heptane-5-carboxylate

(S)-tert-butyl 6-(6-ethynyl-1H-benzo[d]imidazol-2-yl)-5-azaspiro[2.4]heptane-5-carboxylate

5-(tert-butyl) 6-(2-(4-iodophenyl)-2-oxoethyl) (S)-5-azaspiro[2.4]heptane-5,6-dicarboxylate