First intramolecular aromatic substitution by gold(III) of a ligand other than pyridine derivatives. Synthesis and crystal structure of the novel five-membered cycloaurated complex of 1-ethyl-2-phenylimidazole
作者:Yoshio Fuchita、Hidenori Ieda、Mikio Yasutake
DOI:10.1039/a908048a
日期:——
Reactions of gold(III) compounds, AuCl3·4H2O and HAuCl4·4H2O, with 2-phenyl-1H-imidazole (Hpi) and 1-ethyl-2-phenylimidazole (Hepi) have been performed under various reaction conditions: Hpi afforded only the salt [H(Hpi)][AuCl4], while Hepi produced both the salt [H(Hepi)][AuCl4] and the adduct [AuCl3(Hepi)]. Cycloauration of Hepi, the first example of cycloauration of a substrate other than pyridine derivatives, has been established by the formation of [AuCl2(epi-C1,N)] [epi = 2-(1-ethyl-2-imidazolyl)phenyl] from the reaction between the adduct [AuCl3(Hepi)] and AgBF4. The cyclometallated structure of Hepi has been confirmed by the X-ray crystallographic study of a derivative [AuCl(epi-C1,N)(PPh3)]PF6.
与2-苯基-1H-咪唑(Hpi)和1-乙基-2-苯基咪唑(Hepi)反应的金(III)化合物AuCl3·4H2O和HAuCl4·4H2O在不同的反应条件下进行了研究:Hpi仅生成盐[H(Hpi)][AuCl4],而Hepi则生成盐[H(Hepi)][AuCl4]和配合物[AuCl3(Hepi)]。Hepi的环金属化反应是除了吡啶衍生物之外的第一个环金属化实例,通过与AgBF4反应生成[AuCl2(epi-C1,N)] [epi=2-(1-乙基-2-咪唑基)苯基]来确立。Hepi的环金属化结构通过衍生物[AuCl(epi-C1,N)(PPh3)]PF6的X射线晶体学研究得到了确认。