Room temperature N-heterocyclic carbene manganese catalyzed selective <i>N</i>-alkylation of anilines with alcohols
作者:Ming Huang、Yukui Li、Yinwu Li、Jiahao Liu、Siwei Shu、Yan Liu、Zhuofeng Ke
DOI:10.1039/c9cc02989c
日期:——
The first example of room temperature non-noble metal homogeneous system catalyzedselective N-alkylation of anilines with alcohols by a bis-NHC manganese complex is presented. This system was applied to a large range of alcohols and anilines, including biologically relevant motifs and challenging methanol. Experimental and computational studies suggest an outer-sphere mechanism for this NHC–Mn system
The synthesis of the Zaragozic acids: Equilibrium control of stereochemistry in the dioxabicyclo[3.2.1]octane core
作者:Sayee G. Hegde、David C. Myles
DOI:10.1016/s0040-4039(97)00966-0
日期:1997.6
The synthesis of the core of zaragozicacid Bx3 and a general strategy for the synthesis of the dioxabicyclo[3.2.1]octane core of the zaragozicacids is described.
Transition metal free catalytic hydroboration of aldehydes and aldimines by amidinato silane
作者:Milan Kumar Bisai、Sanjukta Pahar、Tamal Das、Kumar Vanka、Sakya S. Sen
DOI:10.1039/c6dt04893e
日期:——
The transition metal free catalytic hydroboration of aldehydes and ketones is very limited and has not been reported with a well-defined silicon(IV) compound. Therefore, we chose to evaluate the previously reported silicon(IV) hydride [PhC(NtBu)2SiHCl2], (1) as a single component catalyst and found that it catalyzes the reductive hydroboration of a range of aldehydes with pinacolborane (HBpin) under
醛和酮的无过渡金属的催化氢硼化非常有限,尚未有明确定义的硅(IV)化合物报道。因此,我们选择评估以前报道的氢化硅(IV)氢化物[PhC(N t Bu)2 SiHCl 2 ],(1)作为单组分催化剂,发现它可以催化频哪醇硼烷催化一系列醛的还原性氢硼化反应( HBpin)。另外,化合物1可以催化亚胺氢硼化。进行了DFT计算以了解其机理。
Isoselective ring-opening polymerization of rac-lactide initiated by achiral heteroscorpionate zwitterionic zinc complexes
作者:Zehuai Mou、Bo Liu、Meiyan Wang、Hongyan Xie、Ping Li、Lei Li、Shihui Li、Dongmei Cui
DOI:10.1039/c4cc05033a
日期:——
A highly isotactic stereoblock PLA has been obtained using the achiral heteroscorpionate zwitterionic zinc complexes as catalysts, for the first time, via a chain-end control mechanism.