β-Spironaphthoxazines 1 undergo oxidative addition of the C–N bond of the indoline moiety at ambient temperature upon treatment with the labile Ru(0) precursor, Ru(η4-cycloocta-1,5-diene)(η6-naphthalene) (2), to give the Ru(II) complex with the naphtholato-tethered 1,4-diazabuta-1,3-diene ligand 3. The reaction should be triggered by chelation of the isomeric azanaphthoquinone structure, which should bring the C–N bond to the position suitable for the oxidative addition.
β-螺
萘并吖嗪1在室温下与不稳定的Ru(0)前体Ru(η4-环
辛-1,5-二烯)(η6-
萘) (2)反应,发生
吲哚部分C-N键的氧化加成,生成Ru(II)络合物,其中
萘酚基与1,4-二氮杂丁-1,3-二烯
配体3相连。反应应由异构氮
萘醌结构的螯合作用引发,使C-N键处于适合氧化加成的位置。