Synthesis and reactions of partially reduced biisoquinolines
作者:Mark C. Elliott、Eve Williams
DOI:10.1039/b306159k
日期:——
An improved synthesis of the 1,1',2,2',3,3',4,4'-octahydro-1.1'-biisoquinoline ring system is described. The reactivity of this system has been investigated, including the unusually high basicity of the parent compound and its N.N'-dimethyl derivative. The resolution of the parent compound has been achieved for the first time, along with the development of a straightforward method for assaying its
Synthesis and properties of a chiral bis-tetrahydroisoquinoline proton spongeDedicated to Professor Harry Heaney on the occasion of his 70th birthday.
作者:Mark C. Elliott、Eve Williams、Siân T. Howard
DOI:10.1039/b110499n
日期:2002.1.23
A new chiral proton sponge has been prepared, and the reasons for its unusually high basicity elucidated by a quantum chemical study.
一种新的手性质子海绵已经制备出来,并通过量子化学研究阐明了其碱度异常高的原因。
Chiral N-heterocyclic carbene ligands based on a biisoquinoline template
作者:Kingsley J. Cavell、Mark C. Elliott、David J. Nielsen、James S. Paine
DOI:10.1039/b611647g
日期:——
New chiral imidazolinium salts with tunable steric features, based on a biisoquinoline template, have been developed and structurally characterised using single crystal X-ray crystallography. The trans PdI2(NHC)2 complex was prepared by reaction of the parent H4 imidazolinium salt with Pd(OAc)2 in the presence of NaI, and the solid state structure determined by X-ray crystallography. The rigid, chiral, biisoquinoline geometry of the H4 imidazolinium salt was found to be maintained upon ligand complexation. The sterically unencumbered parent biisoquinoline ligand has been found to give high conversion with modest enantioselectivity in the copper-catalysed asymmetric addition of diethylzinc to cyclohexenone.
基于生物异喹啉模板开发出了具有可调立体特征的新型手性咪唑啉盐,并利用单晶 X 射线晶体学对其进行了结构鉴定。反式 PdI2(NHC)2 复合物是通过母体 H4 咪唑啉盐与 Pd(OAc)2 在 NaI 存在下反应制备的,并通过 X 射线晶体学确定了其固态结构。研究发现,H4-咪唑啉鎓盐的刚性、手性、双异喹啉几何形状在配体络合时得以保持。在铜催化的二乙基锌与环己烯酮的不对称加成反应中,发现这种无立体位阻的母体生物异喹啉配体具有较高的转化率和适度的对映选择性。
Crystal structures and conformations of two new biisoquinoline derivatives
作者:Mark C. Elliott、K.M. Abdul Malik、Eve Williams
DOI:10.1023/b:jocc.0000028669.22883.be
日期:2004.6
Crystal structuralstudies of two new biisoquinoline derivatives, a neutral compound C20H24N2 (3) and a salt C18H21N2+⋅C10H14BrO4S− ⋅H2O (4) are described and discussed. Compound3 crystallizes in the monoclinic space group P21/c, with a = 11.039(2), b = 7.791(2), c = 19.001(4) Å, β = 104.31(3)°, and Z = 4. Compound 4 crystallizes in the monoclinic space group P21, with a = 12.0021(3), b = 8.9189(2)