[(p-cymene)RuCl2]2 or [Cp★IrCl2]2 with the amide of 2-hydroxyiminopropionic acid and with N-(2-hydroxyiminopropionyl)amino acids gave the following chiral (N,O)- or (N,N)-chelate complexes: (3) (6) (9) (R = H, CH2Ph). The oxime of pyruvoyl methionine forms a (N,N,S)-trischelate complex 10. Complex 5a can be deprotonated in the presence of donors to yield the compounds (7, L = PEt3, PPh3, py). The structures
Cp ★ Co(CO)I 2,[(对-cymene)RuCl 2 ] 2或[Cp ★ IrCl 2 ] 2与2-羟基亚
氨基丙酸的酰胺和N-(2-羟基亚
氨基丙酰基)
氨基酸的反应得到以下手性(N,O)-或(N,N)-螯合物:(3)(6)(9)(R = H,CH 2 Ph)。
丙酮酰甲
硫氨酸的
肟形成(N,N,S)-三螯合物10。配合物5a可以在供体存在的情况下被去质子化以生成化合物(7,L = PEt 3,PPh 3,py)。的结构如图4所示,图6b(R = CH,),8A(R = H)和图8b(R = CH 2 PH)已通过X射线衍射来确定。还已经制备了8的类似物的二肽复合物。观察到的8b和11b(R = CH 2 Ph)的非对映特异性形成可以通过羧基的氧原子与酰胺基团之间的氢键解释。