tert-butyl 3-(2-(tert-butoxy)-2-oxoethylidene)-2-oxoindoline-1-carboxylate 、
4-methyl-1-phenoxycarbonyl-1,2-dihydropyridine 在
(2S)-N-[2,6-di(propan-2-yl)phenyl]-1-[3-[(2S)-2-[[2,6-di(propan-2-yl)phenyl]carbamoyl]-1-oxidopiperidin-1-ium-1-yl]propyl]-1-oxidopiperidin-1-ium-2-carboxamide 、 nickel(II) tetrafluoroborate hexahydrate 作用下,
以
二氯甲烷 为溶剂,
反应 0.58h,
以99%的产率得到1',3-di-tert-butyl 6-phenyl (1S,2R,3R,4S)-8-methyl-2'-oxo-6-azaspiro[bicyclo[2.2.2]octane-2,3'-indolin]-7-ene-1',3,6-tricarboxylate