Amine Activation: Synthesis of <i>N</i>-(Hetero)arylamides from Isothioureas and Carboxylic Acids
作者:Yan-Ping Zhu、Sergey Sergeyev、Philippe Franck、Romano V. A. Orru、Bert U. W. Maes
DOI:10.1021/acs.orglett.6b02247
日期:2016.9.16
A novel method for N-(hetero)arylamide synthesis based on rarely explored amine activation, rather than classical acid activation, is reported. The activated amines are easily prepared using a three-component reaction with commercial reagents. The new method shows a broad scope including challenging amides not (efficiently) accessible via classical protocols.
The iridium-catalyzed highly chemoselective hydrogenation of amides to amines has been developed. Using a well-defined iridium catalyst bearing a P(O)C(O)P pincer ligand combined with B(C6F5)3, the C–O cleavage products are formed undermildreactionconditions. The reaction provides a new method for the preparation of amines from amides in good yield with high selectivity.
已经开发了铱催化的酰胺高度化学选择性氢化成胺的方法。使用带有P(O)C(O)P钳形配体与B(C 6 F 5)3结合的明确定义的铱催化剂,在温和的反应条件下可形成C–O裂解产物。该反应提供了一种以高收率和高选择性从酰胺制备胺的新方法。
Boron Lewis Acid Promoted Ruthenium-Catalyzed Hydrogenation of Amides: An Efficient Approach to Secondary Amines
作者:Ming-Lei Yuan、Jian-Hua Xie、Qi-Lin Zhou
DOI:10.1002/cctc.201600635
日期:2016.10.6
The hydrogenation of amides to amines has been developed by using the catalyst [Ru(H)2(CO)(Triphos)] (Triphos=1,1,1‐tri(diphenylphosphinomethyl)ethane) and catalytic boron Lewis acids such as B(C6F5)3 or BF3⋅Et2O as additives. The reaction provides an efficient method for the preparation of secondary amines from amides in good yields with high selectivity.
The present invention relates to a process for preparing N-(1-alkenyl)carboxamides of the formula I, which comprises reacting a carboxamide of the formula II with an alkyne of the formula III in the presence of a catalyst selected from among carbonyl complexes, halides and oxides of rhenium, manganese, tungsten, molybdenum, chromium and iron.
An Efficient Procedure for the Preparation of Carboxamides and Peptides using<i>in situ</i>Generated<i>N</i>-Succinimidyl Active Esters
作者:Ki-Jong Han、Misoo Kim
DOI:10.1080/00304948.2014.922380
日期:2014.7.4
last two decades.8–15 Previously, we reported the synthesis of N-hydroxysuccinimideesters of carboxylic acids using triphosgene.16 In continuation of our work to develop new methods using triphosgene as an acid activator,17,18 we report herein an efficient one-pot procedure for the synthesis of carboxamides and peptides using N-succinimidyl active esters generated in situ directly from the reaction of