邻苯二甲酸亚胺 、
methyl 4-oxo-4-phenylbut-2-ynoate 、
dimethyl-(4,4,5,5-tetramethyl-[1,3,2]dioxaphospholan-2-yl)-amine 以
四氢呋喃 为溶剂,
以60%的产率得到methyl 5-(dimethylamino)-7-(1,3-dioxoisoindol-2-yl)-2,2,3,3-tetramethyl-7-phenyl-1,4,6-trioxa-5λ5-phosphaspiro[4.4]non-8-ene-9-carboxylate