1-Substituted imidazoles was ozonolyzed cleanly without any complicated procedures into the corresponding N-acylamides, which were regarded to be much useful derivatives of either amines or acyl compounds.
Selective <i>N</i>-formylation/<i>N</i>-methylation of amines and <i>N</i>-formylation of amides and carbamates with carbon dioxide and hydrosilanes: promotion of the basic counter anions of the zinc catalyst
produced N,N-dimethylaniline. Furthermore, our catalytic protocol was developed for the N-formylation of amides and carbamates, which have smaller pKa values and lower reactivities than the corresponding amines. The present Zn(OAc)2/phen catalyst was found to show versatility in the conversion of CO2 and amines into several functionalized organic chemicals under mild conditions. We propose that the basic counter
Cyclopropylamines from N,N-Dialkylcarboxamides and Grignard Reagents in the Presence of Titanium Tetraisopropoxide or Methyltitanium Triisopropoxide
作者:Armin de Meijere、Vladimir Chaplinski、Harald Winsel、Markus Kordes、Björn Stecker、Vesta Gazizova、Andrei I. Savchenko、Roland Boese、Farina Schill née Brackmann
DOI:10.1002/chem.201001550
日期:2010.12.10
Thirty‐three different N,N‐dialkyl‐ and N‐alkyl‐N‐phosphorylalkyl‐substituted carboxamides 9–17 were treated with unsubstituted as well as with 2‐alkyl‐, 2,2‐dialkyl‐, and 3‐alkenyl‐substituted ethylmagnesium bromides 6 in the presence of stoichiometric amounts of titanium tetraisopropoxide or methyltitanium triisopropoxide to furnish substitutedcyclopropylamines 20–25 in 20–98 % yield, depending
Formic acid is used as the sole carbon and hydrogen source in the methylation of aromatic and aliphatic amines to methylamines. The reaction proceeds via a formylation/transfer hydrogenation pathway over a solid Pd/In2O3 catalyst without the need for any additive.
甲酸用作将芳香族和脂肪族胺甲基化为甲胺的唯一碳源和氢源。该反应通过甲酰化/转移氢化途径在固体 Pd/In 2 O 3催化剂上进行,无需任何添加剂。
Biomass-derived γ-valerolactone as an efficient solvent and catalyst for the transformation of CO<sub>2</sub> to formamides
作者:Jinliang Song、Baowen Zhou、Huizhen Liu、Chao Xie、Qinglei Meng、Zhanrong Zhang、Buxing Han
DOI:10.1039/c6gc01455k
日期:——
γ-Valerolactone acts as both a solvent and catalyst for N-formylation of various amines with CO2 to formamides in the presence of phenylsilane without any additional catalysts.
Herein, we describe the first iron catalysts able to promote the reductive functionalization of CO2 using hydrosilanes as reductants. Iron(II) salts supported by phosphine donors enable the conversion of CO2 to formamide and methylamine derivatives under mild reaction conditions.
CO 2的催化氢化硅烷化是形成化学品的有效且选择性的方法。在本文中,我们描述了使用氢硅烷作为还原剂能够促进CO 2还原功能化的第一铁催化剂。膦供体负载的铁(II)盐可在温和的反应条件下将CO 2转化为甲酰胺和甲胺衍生物。