Catalytic C–N bond formation in guanylation reaction by N-heterocyclic carbene supported magnesium(II) and zinc(II) amide complexes
作者:Ashim Baishya、Milan Kr. Barman、Thota Peddarao、Sharanappa Nembenna
DOI:10.1016/j.jorganchem.2014.07.021
日期:2014.10
The catalytic activity of N-heterocycliccarbene (NHC) supported magnesium(II) and a zinc(II) amide complex towards the addition of N–H bond of amine to carbodiimide was studied. Treatment of a free carbene i.e., 1,3-di-tert-butylimidazol-2-ylidene (ItBu) with magnesium and zinc bis(amide) i.e., M[N(SiMe3)2]2, M = Mg or Zn in toluene led to the formation of ItBu:M[N(SiMe3)2]2, M = Mg(1) and Zn(2) compounds
Glioblastoma is a highly malignant form of brain tumor. In the work described here, several substituted phenyl-guanidine derivatives were developed for application in glioblastoma treatment.
Herein, we report the guanylation of carbodiimides with primary and secondary alkyl/aryl amines and the reduction of CDIs via hydroboration using molecular conjugated bis-guanidinate (CBG) aluminum alkyl catalysts. The first example of structurally characterized unsymmetrical tetra-aryl substituted CBG (LH) is reported. The reaction of LH; (L=(Ar1NH)(ArN)−C=N−C=(NAr)(NHAr1)}; Ar1=2,6-iPr2−C6H3, Ar=2
在此,我们报告了碳二亚胺与伯和仲烷基/芳基胺的鸟苷化作用,以及使用分子共轭双胍 (CBG) 烷基铝催化剂通过硼氢化还原 CDI。报道了结构表征的不对称四芳基取代的CBG(LH)的第一个例子。LH的反应;(L=(Ar 1 NH)(ArN)-C=N-C=(NAr)(NHAr 1 )};Ar 1 =2,6- i Pr 2 -C 6 H 3 ,Ar=2,6- Me 2 -C 6 H 3 ) 与 AlMe 3溶液提供了 LAlMe 2 ( 1) 复杂的。对配体 (LH) 和化合物1进行了彻底的表征,包括单晶 X 射线衍射研究。更重要的是,化合物1和 L'AlMe 2 ( 2 );(L'=(ArNH)(ArN)-C=N-C=(NAr)(NHAr)};Ar=2,6-Et 2 -C 6 H 3 )用作NH和B的催化剂-H 与对称芳基或烷基碳二亚胺加成,以优异的收率获得相应的胍和 N-硼基甲脒。所开发的