链烯基三氟硼酸钾盐与酰胺偶合以在温和的氧化条件下使用催化量的Cu(OAc)2生成酰胺。空气和水稳定的烯基三氟硼酸酯盐提供了一种实用的替代方法,可替代使用烯基卤化物和烯基硼酸作为交叉偶联伴侣。多种酰胺参与交叉偶联,包括杂环酰胺,酰亚胺,氨基甲酸酯,苯甲酰胺和乙酰胺。优化研究确定了两组条件,最适合于高p K a或低p K a酰胺底物。较低的p K a在4Å分子筛,10 mol%的Cu(OAc)2和20 mol%的N-甲基咪唑的存在下,使用二氯甲烷溶剂系统,酰胺底物效果最佳。在4Å分子筛和10 mol%Cu(OAc)2的存在下,使用1:1二氯甲烷/ DMSO溶剂系统的“无配体”方案,较高的p K a酰胺底物效果最佳。交叉偶联反应立体定向地发生,并保留了烯基三氟硼酸盐的烯构型。所采用的温和的反应条件可耐受各种功能,包括硝基,乙缩醛,烷基和芳基卤化物,以及α,β-不饱和羰基。最后,研究了铜源的重要性和微量杂质的存在。
Z-Selective hydroamidation of terminal alkynes with secondary amides and imides catalyzed by a Ru/Yb-system
作者:Annette E. Buba、Matthias Arndt、Lukas J. Gooßen
DOI:10.1016/j.jorganchem.2010.08.034
日期:2011.1
to catalyze the addition of nitrogen nucleophiles to terminalalkynes under mild conditions to stereoselectively form the Z-enamide or Z-enimide products. Various secondaryamides and imides could be added across the triple bond of a range of aliphatic and aromatic alkynes. The new bimetallic catalyst system sets new standards with regard to scope and selectivity for the synthesis of Z-configured anti-Markovnikov
A Practical and Effective Ruthenium Trichloride-Based Protocol for the Regio- and Stereoselective Catalytic Hydroamidation of Terminal Alkynes
作者:Lukas J. Gooßen、Matthias Arndt、Mathieu Blanchot、Felix Rudolphi、Fabian Menges、Gereon Niedner-Schatteburg
DOI:10.1002/adsc.200800508
日期:——
4-(dimethylamino)pyridine and potassium carbonate, effectively promotes the addition of secondaryamides, lactams and carbamates to terminalalkynes under formation of (E)-anti-Markovnikov enamides. The scope of the new protocol is demonstrated by the synthesis of 24 functionalized enamide derivatives, among them valuable intermediates for organic synthesis.
Photoredox Approach to <i>N</i>-Acyl-<i>N′</i>-aryl-<i>N</i>,<i>N′</i>-aminals Using Enamides and Their Conversion to γ-Lactams
作者:Olusesan K. Koleoso、Mark R. J. Elsegood、Simon J. Teat、Marc C. Kimber
DOI:10.1021/acs.orglett.7b03946
日期:2018.2.16
A photoredox catalytic approach to synthetically valuable N-acyl-N′-aryl-N,N′-aminals is described. This method uses the addition of a radical precursor to enamides, with subsequent interception of the cationic iminium intermediate with an arylamine. The reaction has been shown to be compatible with electron-rich and electron-deficient arylamines, and moderate to good levels of diastereoselectivity
Enamide Synthesis by Copper-Catalyzed Cross-Coupling of Amides and Potassium Alkenyltrifluoroborate Salts
作者:Yuri Bolshan、Robert A. Batey
DOI:10.1002/anie.200704711
日期:2008.2.28
[DE] VERFAHREN ZUR ADDITION VON AMIDEN, HARNSTOFFEN. LACTAMEN UND CARBAMATEN AN ALKINE<br/>[EN] METHOD FOR THE ADDITION OF AMIDES UREAS LACTAMS AND CARBAMATES TO ALKYNES<br/>[FR] PROCEDE D'ADDITION D'AMIDES, DE CARBAMIDES, DE LACTAMES ET DE CARBAMATES A DES ALCYNES
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2006056166A2
公开(公告)日:2006-06-01
[EN] A method for the production of N-alkenyl compounds is disclosed, in which N-H compounds are reacted with terminal alkynes in the presence of catalytic amounts of organoruthenium complexes. [FR] L'invention concerne un procédé de production de composés de N-alcényle, consistant à faire réagir des composés N-H avec des alcynes terminales en présence de quantités catalytiques de complexes d'organyle et de ruthénium. [DE] Es wird ein Verfahren zur Herstellung von N-Alkenylverbindungen beansprucht, in welchem N-H-Verbindungen mit terminalen Alkinen in Gegenwart katalytischer Mengen an Rutheniumorganylkomplexen umgesetzt werden.