The treatment of 5-[2-(dimethylamino)benzylidene]-3-methyl-2-(methylsulfanyl)-3,5-dihydro-4H-imidazol-4-ones with catalytic amounts of scandium triflate resulted in a [1,5]-hydride shift followed by cyclization, giving 1,1'-dimethyl-2-(methylsulfanyl)-1',4'-dihydro-2'Hspiro[imidazole-4,3'-quinolin]-5(1H)-ones. All of the newly synthesized compounds containing various substituents in the benzylidene moiety were isolated in good yields.

中文翻译：

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[2-(二甲氨基)亚苄基]-2-(甲基硫烷基)咪唑酮合成螺[咪唑-4,3'-喹啉]酮

用催化量的三氟甲磺酸钪处理 5-[2-(二甲氨基)苯亚甲基]-3-甲基-2-(甲基硫烷基)-3,5-二氢- 4 H -咪唑-4-酮导致 [1, 5]-氢化物转移，然后环化，得到 1,1'-二甲基-2-(甲基硫烷基)-1',4'-二氢-2' H螺[咪唑-4,3'-喹啉]-5(1 H）-那些。所有在亚苄基部分含有各种取代基的新合成化合物均以良好的产率分离。