Acceptorless Dehydrogenation of Alcohols Catalyzed by Cu<sup>I</sup><i>N</i>-Heterocycle Thiolate Complexes
作者:Da-Wei Tan、Hong-Xi Li、Meng-Juan Zhang、Jian-Lin Yao、Jian-Ping Lang
DOI:10.1002/cctc.201601459
日期:2017.3.20
CuI N‐heterocycle thiolate clusters efficiently catalyze the acceptorless dehydrogenation of alcohols at 70 °C. A variety of secondary/primary benzylic, allylic, and aliphatic alcohols are dehydrogenated to the corresponding ketones and aldehydes in high yields of isolated product upon release of H2. This simple catalytic system is involved in the synthesis of imines through the one‐pot reaction of
Cu I N杂环硫醇盐簇在70°C时有效催化醇的无受体脱氢。释放H 2时,可以以高收率的分离产物将各种仲/伯苄基,烯丙基和脂族醇脱氢成相应的酮和醛。这个简单的催化系统通过醇和胺的一锅法反应参与亚胺的合成。
Novel <i>N</i>
-Alkylbenzimidazole-Ruthenium (II) complexes: Synthesis and catalytic activity of N-alkylating reaction under solvent-free medium
performed in toluene, the catalytic study of complexes 2a‐d has carried out no additional solvent and alcohol acted both as solvent and reactant of alkylating by using a little excess of alcohols. Surprisingly, conversion and selectivity of amine product for alkylation reaction have been seen high in medium solvent‐free relative to in toluene.
在本文中,已经研究了胺与醇衍生物的直接N烷基化反应。为此,已经合成了带有N配位苯并咪唑配合物的新系列钌(II)配合物,并通过元素分析,FT-IR,1 H NMR和13 C NMR光谱进行了全面表征。此外,配合物2b和2c的结构已通过X射线晶体学确认。尽管N-烷基化反应通常在甲苯中进行,但配合物2a-d的催化研究没有使用额外的溶剂,并且通过使用少量过量的醇,醇既充当溶剂又充当烷基化反应物。令人惊讶的是,与甲苯相比,在无溶剂的中等溶剂中胺产物的烷基化反应转化率和选择性高。
Copper(I)-Catalyzed Regioselective Amination of <i>N</i>-Aryl Imines Using TMSN<sub>3</sub> and TBHP: A Route to Substituted Benzimidazoles
efficient copper-catalyzed amination of N-aryl imines is described. This one-pot, multicomponent reaction, in which imine acts as a directing group by chelating to the metal center, affords a potential route for the transformation of the commercial aryl amines, aldehydes, and azides into valuable benzimidazole structural units with wide substrate scope and diversity. The synthetic and mechanistic aspects
amidines. Ynamides reacted with benzophenoneimines in the presence of triflic imide as a catalyst. Ynamides bearing a sulfonamide moiety gave the corresponding 2-amino-3,4-dihydroquinolines selectively in good to high yields. In contrast, yne-carbamates gave the corresponding α,β-unsaturated amidines exclusively. These methods permit simple preparation of stericallycrowded polysubstituted quinolines and
The Diverse Reactivity of Homopropargylic Amines as “Masked” 1C Synthons for the Aza-Friedel-Crafts Alkylation of Indoles
作者:Hao Chen、Min Ni、Xiaofeng Bao、Chan Wang、Lingyan Liu、Weixing Chang、Jing Li
DOI:10.1002/ejoc.201701523
日期:2018.1.31
A novel type of “masked” 1C synthon was developed through the hydroamination cyclization‐protonation of homopropargylic amines to act as aza‐Friedel–Crafts alkylation reagents to react with indoles. A variety of 3‐(2‐pyrrolidinyl)indoles were generated in good to high yields.