ethyl 2-(4-((2-chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl)amino)phenyl)acetate 、 N-Boc-哌嗪 以to afford the title compound (0.034 g, 21%) as an orange foam的产率得到tert-butyl 4-(4-((4-(2-ethoxy-2-oxoethyl)phenyl)amino)-6,7-dihydro-5H-cyclopenta[b]pyridin-2-yl)piperazine-1-carboxylate