Novel metal complexes containing a chiral trinitrogen isoindoline-based pincer ligand: in situ synthesis and structural characterization
作者:Jessica L. Cryder、Andrew J. Killgore、Curtis Moore、James A. Golen、Arnold L. Rheingold、Christopher J. A. Daley
DOI:10.1039/c0dt00869a
日期:——
The first synthesis and characterization of metal coordinated complexes containing in situ prepared chiral trinitrogen 1,3-bis(4,5-dihydrooxazol-2-ylimino)isoindoline-based pincer ligands are reported. Two zinc complexes, isolated as Zn(L)2, where L = 1,3-bis(4,5-dihydro-4-(R)-phenyloxazol-2-ylimino)isoindoline ((R,R)-5) or 1,3-bis(4,5-dihydro-4-(S)-iso-propyloxazol-2-ylimino)isoindoline ((S,S)-6), respectively, are reported. Complexes Zn((R,R)-5)2 and Zn((S,S)-6)2 were prepared in situ through the condensation of phthalonitrile with enantiopure 2-amino-4-(R)-phenyloxazoline ((R)-3) or 2-amino-4-(S)-iso-propyloxazoline ((S)-4) in the presence of ZnCl2 at 80 °C in dry toluene over 3–4 days. The characterizations of Zn((R,R)-5)2 and Zn((S,S)-6)2 in both the solid (X-ray crystallography) and solution (multinuclear NMR spectroscopy) states are reported.
报道了在位合成的含有手性三氮1,3-bis(4,5-dihydrooxazol-2-ylimino)异茚基夹 ligand 的金属配位复合物的首次合成和表征。报道了两个锌复合物,分别为Zn(L)2,其中L = 1,3-bis(4,5-dihydro-4-(R)- phenyloxazol-2-ylimino)异茚 ((R,R)-5) 或 1,3-bis(4,5-dihydro-4-(S)-异丙基氧唑-2-亚胺)异茚 ((S,S)-6)。复合物Zn((R,R)-5)2和Zn((S,S)-6)2是通过在干燥的甲苯中,在80 °C,存在ZnCl2的条件下,通过邻苯二腈与对映体纯的2-amino-4-(R)- phenyloxazoline ((R)-3)或2-amino-4-(S)-异丙基氧唑 ((S)-4)的缩合反应在3-4天内原位制备的。对固态(X射线晶体学)和溶液态(多核NMR光谱)下Zn((R,R)-5)2和Zn((S,S)-6)2的表征结果也进行了报道。