6-Chloro-3,3-dimethyl-2,3-dihydro-1H-pyrrolo[3,2-b]pyridine
6-Bromo-3,3-dimethyl-2,3-dihydro-1H-pyrrolo[3,2-b]pyridine
tert-Butyl 3-chloro-7,7-dimethyl-6,7-dihydro-5H-pyrrolo[3,2-c]pyridazine-5-carboxylate
Tert-butyl 6-bromo-3,3-dimethyl-2,3-dihydro-1H-pyrrolo[3,2-b]pyridine-1-carboxylate