、 在
3,6-bis(dimethylamino)-9-(4-(dimethylamino)-2,6-dimethoxyphenyl)-1,8-dimethoxy-10-(2-(pyridine-2-yl)ethyl)-9,10-dihydroacridin-9-ylium tetrafluoroborate 作用下,
以
乙腈 为溶剂,
以60 %的产率得到10-ethyl-1,9-dimethyl-4-oxo-3,6-diphenyl-2,3-diazaspiro[4.5]deca-1,7-diene-7-carbaldehyde