Direct platination as a route to conformationally restricted enantiopure C2-symmetric bisoxazoline pincer complexes
作者:John S. Fossey、Geraint Jones、Majid Motevalli、Huy V. Nguyen、Christopher J. Richards、Mark A. Stark、Helen V. Taylor
DOI:10.1016/j.tetasy.2004.05.032
日期:2004.7
inyl)phenyl-N,C1,N′]platinum(II) 5 (22% yield). Similarly prepared were (S,S)-chloro[2,6-bis(4′-methylenecyclohexyl-2′-oxazolinyl)phenyl-N,C1,N′]platinum(II) 6 (9%) and (S,S)-chloro[2,6-bis(4′-methylethyl-2′-oxazolinyl)-4-nitrophenyl-N,C1,N′]platinum(II) 18 (21%). Chloride abstraction from 5 with AgOTf and 6 with AgOTf or AgSbF6, resulted in isolation of the corresponding salts of (S,S)-aqua[2,6-bis(5′
由(S)-2-氨基-3-环己烷丙酸分四步合成(S)-3-氨基-4-环己基-2-甲基丁烷-2-醇10(总收率47%)。的反应10与1,3-双(乙基甲亚氨酸酯)苯,得到(小号,小号)-1,3-双(4- ' -环己基-5- ' ,5 ' -二甲基-2 ' -oxazolinyl)苯13以53%的屈服。加热13在乙酸具有K回流2氯铂酸4得到(小号,小号) -氯[2,6-双(5 ' ,5 '-二甲基- 4 ' -methylenecyclohexyl-2 ' -oxazolinyl)苯基Ñ,Ç 1,Ñ ' ]铂(II)5(22%收率)。类似地制备(小号,小号) -氯[2,6-双(4 ' -methylenecyclohexyl-2 ' -oxazolinyl)苯基Ñ,Ç 1,Ñ ' ]铂(II)6(9%)和(小号,小号) -氯[2,6-双(4 ' -甲基乙基-2 ' -oxazolinyl)-4-硝基苯基ñ,ç1,N