A copper modified phosphorus doped g-C3N4 (Cu/P-CN) has been prepared and identified as an efficient catalyst for the synthesis of N-arylpyridin-2-amine derivatives by the reaction of 2-aminopyridine and aryl boronic acid under the irradiation of blue light.
Palladium/Silver Synergistic Catalysis in Direct Aerobic Carbonylation of C(sp<sup>2</sup>)<i>−</i>H Bonds Using DMF as a Carbon Source: Synthesis of Pyrido-Fused Quinazolinones and Phenanthridinones
作者:D. Nageswar Rao、Sk. Rasheed、Parthasarathi Das
DOI:10.1021/acs.orglett.6b01292
日期:2016.7.1
An unprecedented Pd/Ag synergistic catalysis in the direct carbonylation of C(sp2)–H bonds utilizing DMF as the carbon source under oxygen is described and demonstrated in the synthesis of pyrido-fused quinazolinone and phenanthridinone scaffolds. Control experiments indicated that the “C” of the carbonyl group is derived from the methyl group of DMF and “O” originates from oxygen as in the case of
A cascade C–H functionalization/cyclization reaction of N-arylpyridin-2-amines with α,β-unsaturated aldehydes for the synthesis of dihydroquinolinone derivatives under rhodium catalysis
作者:Zi-Jun Wu、Kenneth L. Huang、Zhi-Zhen Huang
DOI:10.1039/c7ob00743d
日期:——
A novel cascade C–H functionalization/cyclizationreaction of N-arylpyridin-2-amines with α,β-unsaturated aldehydes has been developed under rhodium catalysis, affording dihydroquinolinone derivatives in moderate to excellent yields. A plausible mechanism of dual catalytic cycles by rhodium(III) catalysis is also proposed.
Iron-Catalyzed Intermolecular C–N Cross-Coupling Reactions via Radical Activation Mechanism
作者:Subrata Das、Andreas W. Ehlers、Sima Patra、Bas de Bruin、Buddhadeb Chattopadhyay
DOI:10.1021/jacs.3c05627
日期:2023.7.12
aromatic and aliphatic azides with boronic acids under iron-catalyzed conditions. The amination follows an unprecedented metalloradical activation mechanism that is different from traditional metal-catalyzed C–N cross-coupling reactions. The scope of the reaction has been demonstrated by the employment of a large number of tetrazoles, azides, and boronic acids. Moreover, several late-stage aminations
A General Catalyst for Buchwald-Hartwig Amination to Prepare Secondary Five-Membered Heteroaryl Amines with Breaking the Base Barrier
作者:Fabin Zhou、Lixue Zhang、Wenbo Hu、Bingxin Yuan、Ji-cheng Shi
DOI:10.1016/j.jcat.2023.02.018
日期:2023.3
sometimes needing strongbases, perplexes the application of the palladium-catalyzed CN cross-coupling reactions. The terphenyl phosphine TXPhos supporting palladium catalyst [(TXPhos)(allyl)PdCl] dramatically broadened the existing scope of five-membered heteroaryl substrates and made the weak bases KHCO3 and KOAc become general and optimal choices. Therefore, the barrier of bases has been broken and
底物的范围限制,特别是五元杂芳基底物通常出现在医学和生物活性分子中,以及高钯负载量和有时需要强碱,困扰着钯催化的 C N 交叉偶联反应的应用。三联苯基膦TXPhos负载钯催化剂[(TXPhos)(allyl)PdCl]大大拓宽了五元杂芳基底物的现有范围,使弱碱KHCO 3 和KOAc成为通用和优化的选择。因此,碱基屏障已被打破,并建立了通过钯催化的 C N 交叉偶联反应制备仲五元杂芳基胺的有吸引力的方案。