本研究合成了一系列具有N , N'-二芳基草酰胺酯和N , N'-二芳基二硫代草酰胺酯配体的Al催化剂,并测定了它们的ε-己内酯聚合速率。在带有N , N '-二芳基二硫代草酰胺酸酯的 Al 配合物中,[Ph H NCS] 2 Al 2 Me 4表现出最高的催化活性(聚ε-己内酯的转化率 = 94%;[ε-己内酯]:[ [ Ph H NCS] 2 Al 2 Me 4 ]:[苯甲醇] = 100:0.5:2,[ε-己内酯] = 2 M,在 25 °C 下 20 分钟后),以及带有 N , N '-二芳基二草酰胺酸酯的Al配合物,[Ph H NCO] 2 Al 2 Me 4表现出最高的催化活性(聚ε-己内酯的转化率 = 94%;[ε-己内酯]:[ O H Al 2 Me 4 ]:[苯甲醇] = 100: 0.5:2,[ε-己内酯] = 2 M,25 °C,30 分钟后)。带有N , N'-二芳
Highly Productive α-Alkylation of Ketones with Alcohols Mediated by an Ir–Oxalamidato/Solid Base Catalyst System
作者:Hideo Shimizu、Hironori Maeda、Hideki Nara
DOI:10.1021/acs.oprd.0c00362
日期:2020.11.20
An Ir–oxalamidato complex in combination with a solid base (e.g., magnesium aluminometasilicate/Ca(OH)2) significantly improved the catalyst productivity in α-alkylation of methyl ketones with primary alcohols. Optimization through systematic variation of the oxalamidato ligand led to a practical turnover number (TON) of 10 000–40 000.
Rhodium(I) Complexes of
<i>N</i>
‐Aryl‐Substituted Mono‐ and Bis(amidinates) Derived from Their Alkali Metal Salts
作者:Eric M. B. Moos、Sandra González‐Gallardo、Michael Radius、Frank Breher
DOI:10.1002/ejic.201800349
日期:2018.7.13
The synthesis and characterization of several rhodium(I) complexes of amidinate and linker‐bridged bis(amidinate) ligands are presented. The amidinate ligands for the mononuclear complexes CH3C(NMes)2Rh(cod)} (1), CH3C(NDipp)2Rh(cod)} (2), and HCCC(NDipp)2Rh(cod)} (3) (cod = 1,5‐cyclooctadiene) were synthesized by reacting the corresponding organometallic precursor [Rh(cod)Cl]2 with the alkali metal
本文介绍了several酰胺和连接桥联双(ami酰胺)配体的几种铑(I)配合物的合成和表征。单核络合物CH 3 C(NMes)2 Rh(cod)}(1),CH 3 C(NDipp)2 Rh(cod)}(2)和HCC C(NDipp)2 Rh (cod)}(3)(cod = 1,5-环辛二烯)是通过使相应的有机金属前体[Rh(cod)Cl] 2与碱金属a酰胺CH 3 C(NR)2 Li} L1Li(R = Mes = 2,4,6-Me 3 C 6 H 2)和L2Li(R = Dipp = 2,6‐ i Pr 2 C 6 H 3)。类似地,可以将炔基官能化的sodium化钠(HCC C(NDipp)2 Na} · 2DME,L3Na)进一步去质子化,并与碳二亚胺反应形成炔桥双(酰胺基)CC C(NDipp)2 Na( thf)} 2(L4Na),其用作合成CC C(NDipp)2
CuI/Oxalic Diamide Catalyzed Coupling Reaction of (Hetero)Aryl Chlorides and Amines
作者:Wei Zhou、Mengyang Fan、Junli Yin、Yongwen Jiang、Dawei Ma
DOI:10.1021/jacs.5b08411
日期:2015.9.23
A class of oxalic diamides are found to be effective ligands for promoting CuI-catalyzed aryl amination with less reactive (hetero)aryl chlorides. The reaction proceeds at 120 °C with K3PO4 as the base in DMSO to afford a wide range of (hetero)aryl amines in good to excellent yields. The bis(N-aryl) substituted oxalamides are superior ligands to N-aryl-N'-alkyl substituted or bis(N-alkyl) substituted
发现一类草酸二酰胺是促进 CuI 催化的芳基胺化与反应性较低的(杂)芳基氯化物的有效配体。该反应在 120 °C 下以 K3PO4 作为碱在 DMSO 中进行,以良好到极好的收率提供范围广泛的(杂)芳基胺。双(N-芳基)取代的草酰胺是优于N-芳基-N'-烷基取代或双(N-烷基)取代的草酰胺的配体。配体中芳环的电子性质和空间性质对其效率都很重要。
Copper-Catalyzed Coupling Reaction of (Hetero)Aryl Chlorides and Amides
作者:Subhadip De、Junli Yin、Dawei Ma
DOI:10.1021/acs.orglett.7b02326
日期:2017.9.15
amide is established to be an effective catalyst system for Goldberg amidation with inferior reactive (hetero)aryl chlorides, which have not been efficiently documented by Cu-catalysis to date. The reaction is well liberalized toward a variety of functionalized (hetero)aryl chlorides and a wide range of aromatic and aliphatic primary amides in good to excellent yields. Furthermore, the arylation of
Cu 2 O / N,N'-双(噻吩-2-基甲基)草酰胺被确立为用较差的反应性(杂)芳基氯化物进行戈德堡酰胺化的有效催化剂体系,迄今为止,Cu催化还没有有效地证明这一点。 。反应很好地放宽了对各种官能化的(杂)芳基氯化物以及各种芳族和脂族伯酰胺的反应,收率非常好。此外,实现了内酰胺和恶唑烷酮的芳基化。本催化体系还完成了分子内的交叉偶联产物。
Assembly of Primary (Hetero)Arylamines via CuI/Oxalic Diamide-Catalyzed Coupling of Aryl Chlorides and Ammonia
作者:Mengyang Fan、Wei Zhou、Yongwen Jiang、Dawei Ma
DOI:10.1021/acs.orglett.5b03230
日期:2015.12.4
A general and practical catalytic system for aryl amination of aryl chlorides with aqueous or gaseousammonia has been developed, with CuI as the catalyst and bisaryl oxalic diamides as the ligands. The reaction proceeds at 105–120 °C to provide a diverse set of primary (hetero)aryl amines in high yields with various functional groups.