Copper-catalyzed [2+3]-annulation of N–H imines with vinyl azides: access to polyaryl 2<i>H</i>-imidazoles
作者:Zhongzhi Zhu、Hanze Lin、Baihui Liang、Junjie Huang、Wanyi Liang、Lu Chen、Yubing Huang、Xiuwen Chen、Yibiao Li
DOI:10.1039/c9cc10042c
日期:——
A practical method for the synthesis of 2H-imidazoles via a [2+3] annulation of N-H imines with vinylazides using a copper catalyst is developed. In this conversion, environmentally friendly oxygen is used as the sole oxidant and N2 and H2O are the only by-products. The catalytic transformation, operating under mild conditions, is operationally simple and is considered as a readily available catalytic
Selective Oxidative [4+2] Imine/Alkene Annulation with H<sub>2</sub>
Liberation Induced by Photo-Oxidation
作者:Xia Hu、Guoting Zhang、Faxiang Bu、Aiwen Lei
DOI:10.1002/anie.201711359
日期:2018.1.26
The oxidative [4+2] annulationreaction represents an elegant and versatile syntheticprotocol for the construction of six‐membered heterocyclic compounds. Herein, a photoinduced oxidative [4+2] annulation of NH imines and alkenes was developed by utilizing a dual photoredox/cobaloxime catalytic system. Various multisubstituted 3,4‐dihydroisoquinolines can be obtained in good yields. This method is
Cross-Coupling of Alkyl Redox-Active Esters with Benzophenone Imines: Tandem Photoredox and Copper Catalysis
作者:Runze Mao、Jonathan Balon、Xile Hu
DOI:10.1002/anie.201804873
日期:2018.7.20
esters, readily derivedfrom alkyl carboxylic acids, with benzophenone‐derived imines. Hydrolysis of the coupling products furnish alkylated primary amines. Primary, secondary, and tertiary alkyl groups can be transferred, and the coupling tolerates a diverse set of functional groups. The method allows rapid functionalization of natural products and drugs, and can be used to expedite syntheses of pharmaceuticals
METHOD OF MAKING UP WITH LIGHT-SENSITIVE MAKEUP BY APPLYING A BASE LAYER AND A KIT FOR IMPLEMENTING SUCH A METHOD
申请人:GIRON Franck
公开号:US20100215599A1
公开(公告)日:2010-08-26
The present invention provides a method of making up human keratinous material with light-sensitive makeup, wherein:
a) a base layer of a first composition is applied to the keratinous material, the first composition containing at least one optical agent that configured for, at least temporarily, of forming a screen at a wavelength λ; and
b) a thermally stable photochromic second composition is applied on the base layer, the second composition being developable by exposure to a radiation at least of the wavelength λ.
本发明提供了一种利用光敏化妆品修饰人类角质材料的方法,其中:
a) 在角质材料上涂抹第一组分的基层,所述第一组分至少包含一种光学剂,该光学剂被配置为至少暂时地在波长λ处形成屏幕;以及
b) 在基层上涂抹热稳定的光致变色第二组分,所述第二组分可通过暴露至少波长λ的辐射来发展。
Scandium(III) Triflate Catalyzed Direct Synthesis of <i>N</i>-Unprotected Ketimines
intermediates for synthesizing valuable nitrogen-containing compounds, but their potential applicability is limited by the available synthetic methods. To address this issue, we report a scandium(III) triflate catalyzed direct synthesis of N-unprotected ketimines. Using commercially available reagents and Lewis acid catalysts, ketones were directly transformed into the corresponding N-unprotected ketimines