A novel and versatile method for the synthesis of 2H-imidazoles via iron-catalyzed [3 + 2] annulation from readily available oxime acetates with vinyl azides has been developed. This denitrogenative process involved N–O/N–N bond cleavages and two C–N bond formations to furnish 2,4-substituted 2H-imidazoles. This protocol was performed under mild reaction conditions and needed no additives or ligands
[EN] BORON-CONTAINING CYCLIC EMISSIVE COMPOUNDS AND COLOR CONVERSION FILM CONTAINING THE SAME<br/>[FR] COMPOSÉS ÉMISSIFS CYCLIQUES CONTENANT DU BORE ET FILM DE CONVERSION DE COULEUR LES CONTENANT
申请人:NITTO DENKO CORP
公开号:WO2021146380A1
公开(公告)日:2021-07-22
The present disclosure relates to novel photoluminescent complex comprising a BODIPY moiety covalently bonded to a blue light absorbing moiety, and a color conversion film, a back-light unit using the same.
Enantioselective Borohydride Reduction Catalyzed by Optically Active Cobalt Complexes
作者:Tohru Yamada、Takushi Nagata、Kiyoaki D. Sugi、Kiyotaka Yorozu、Taketo Ikeno、Yuhki Ohtsuka、Daichi Miyazaki、Teruaki Mukaiyama
DOI:10.1002/chem.200304794
日期:2003.9.22
enantioselective borohydride reduction of aromatic ketones or imines to the corresponding alcohols was developed in the presence of a catalytic amount of an opticallyactive cobalt(II) complex catalyst. This enantioselective reduction is carried out using a precisely premodified borohydride with alcohols such as tetrahydrofurfuryl alcohol, ethanol and methanol. High optical yields are obtained by choosing
Rhodium(<scp>iii</scp>)-catalyzed asymmetric [4+1] spiroannulations of <i>O</i>-pivaloyl oximes with α-diazo compounds
作者:Lincong Sun、Bingxian Liu、Yanlian Zhao、Junbiao Chang、Lingheng Kong、Fen Wang、Wei-Qiao Deng、Xingwei Li
DOI:10.1039/d1cc02888j
日期:——
Chiral RhIII catalysts can catalyze the asymmetric [4+1] spiroannulation of O-pivaloyl oximes with α-diazo homophthalimides under redox-neutral and acid/base-neutral conditions, leading to formation of chiral spirocyclic imines as a result of C–H activation and N–O cleavage. The reaction proceeded with high efficiency and features broad substrate scope, mild reaction conditions, and high to excellent
Enantioselective [3+2] coupling of cyclic enamides with quinonemonoimines was realised using a chiralphosphoricacid as a catalyst. This transformation allowed for the synthesis of highly enantioenriched polycyclic 2,3-dihydrobenzofurans...