readily available N-(2-pyridyl)anilines and commercially available α-Cl ketones through iridium-catalyzed C–H activation and cyclization is reported here. As a complementary approach to the conventional strategies for indole synthesis, the transformation exhibits powerful reactivity, tolerates a large number of functional groups, and proceeds with good to excellent yields undermildconditions, providing
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
Benzocarbazole Synthesis via Visible-Light-Accelerated Rh(III)-Catalyzed C–H Annulation of Aromatic Amines with Bicyclic Alkenes
作者:Yichun Wang、Deyang Jia、Jing Zeng、Yuming Liu、Xiubin Bu、Xiaobo Yang
DOI:10.1021/acs.orglett.1c02709
日期:2021.10.15
A visible-light-accelerated Rh(III)-catalyzed C–H annulation of aromatic amines with bicyclic alkenes for the synthesis of benzocarbazole derivatives was developed. In this approach, with the cooperation of rhodium catalysis and visible-light irradiation, various aromatic amines reacted with oxabicyclic alkenes and azabicyclic alkenes smoothly at room temperature, delivering the corresponding bridged
开发了一种用于合成苯并咔唑衍生物的可见光加速 Rh(III) 催化芳胺与双环烯烃的 C-H 环化。在该方法中,在铑催化和可见光照射的协同作用下,各种芳香胺与氧杂双环烯烃和氮杂双环烯烃在室温下顺利反应,以良好的收率得到相应的桥连氧杂或氮杂四氢苯并咔唑。此外,通过进一步的一锅芳构化,方便地合成了一系列苯并[ b ]咔唑。通过定向基团去除、衍生化、放大反应和荧光研究证明了该方法的潜力。
Ruthenium-catalyzed synthesis of indole derivatives from <i>N</i>-aryl-2-aminopyridines and alpha-carbonyl sulfoxonium ylides
Indole is a ubiquitous structural motif with important applications in many areas of chemistry. Given this, a simple and efficient Ru(II)-catalyzed synthesis of indole via intermolecular annulation of N-aryl-2-aminopyridines and sulfoxonium ylides was proposed and accomplished. Excellent selectivity and good functional group tolerance of this transformation were observed. This protocol provides easy