tert-Butyl 4-[3-(5-cyanopyridin-3-yl)prop-2-ynylidene]piperidine-1-carboxylate 、
3-溴-4-氰基吡啶 在
tert-butyl 4-[3-(6-cyanopyridin-3-yl)prop-2-ynylidene]piperidine-1-carboxylate 、 EtOAc—Petroleum Ether 作用下,
生成 tert-butyl 4-[3-(6-cyanopyridin-3-yl)prop-2-ynylidene]piperidine-1-carboxylate