3,6-二叔丁基环己-3,5-二烯-1,2-二酮 、
(4,4,5,5-tetramethyl-3-oxido-1-oxo-4,5-dihydro-1H-1l4-imidazol-2-yl)lithium 以
四氢呋喃 为溶剂,
反应 20.0h,
以42%的产率得到2-[3,6-di-tert-butyl-2-oxo-5-(4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-yloxy)-2,5-dihydrooxepin-7-yl]-4,4,5,5-tetramethyl-3-oxido-4,5-dihydro-1H-imidazole 1-oxyl