Ruthenium-Catalyzed Atropoenantioselective Synthesis of Axial Biaryls via Reductive Amination and Dynamic Kinetic Resolution
作者:Donghui Guo、Jianwei Zhang、Bei Zhang、Jian Wang
DOI:10.1021/acs.orglett.8b02785
日期:2018.10.5
via a cascade transfer hydrogenation and dynamic kinetic resolution strategy is described. This protocol features broad substrate scope and good functional group tolerance and allows the rapid assembly of axially chiral biaryls in good to high yields with high to excellent enantioselectivities. In addition, such structural motifs may have potential applications in enantioselective catalysis as chiral
Synthesis of phenanthridine and its analogues via aerobic ligand-free domino Suzuki coupling–Michael addition reaction catalyzed by in situ generated palladium-nanoparticles in water
作者:Munmun Ghosh、Atiur Ahmed、Shubhendu Dhara、Jayanta K. Ray
DOI:10.1016/j.tetlet.2013.06.089
日期:2013.9
A convenient methodology has been developed towards the synthesis of substituted phenanthridines and analogous benzo[k] and benzo[i] derivatives via aerobic ligand-free domino Suzuki coupling–Michael addition reaction in the presence of Pd(OAc)2 and K3PO4 as a catalytic system in H2O at 90 °C in good yields. Reaction was believed to be catalyzed by in situ generated palladium nanoparticles in water
在无Pd(OAc)2和K 3 PO 4存在下,通过无需氧配体多米诺Suzuki偶联-Michael加成反应,已经开发了一种便利的方法,用于合成取代的菲啶以及类似的苯并[ k ]和苯并[ i ]衍生物在90°C的H 2 O中用作催化体系,收率很高。据信该反应是通过在水中原位生成的钯纳米粒子并消除了丙酮来催化的。
Suzuki cross coupling followed by cross dehydrogenative coupling: An efficient one pot synthesis of Phenanthrenequinones and analogues
作者:Pompy Sarkar、Atiur Ahmed、Jayanta K. Ray
DOI:10.1016/j.tetlet.2020.151701
日期:2020.3
An efficient one pot protocol has been developed towards the synthesis of substituted phenanthrenequinone and analogous derivatives via Suzuki cross coupling followed by copper catalyzed cross dehydrogenative coupling.
Palladium-Catalyzed Intramolecular C-H Activation: A Synthetic Approach towards Polycyclic Aromatic Hydrocarbons
作者:Jayanta Ray、Sunanda Paul、Rathin Jana
DOI:10.1055/s-0029-1220070
日期:2010.6
A simple and convenient synthetic protocol for the construction of polycyclic aromatic hydrocarbons has been developed. A variety of phenanthrene, benzo[c]phenanthrene and chrysene derivatives was synthesized via Pd-catalyzed intramolecular C-H activation followed by acid-catalyzed water elimination.
Synthesis of Phenanthridines and Analogues via Suzuki Coupling and Condensation
作者:Jayanta Ray、Shubhendu Dhara、Munmun Ghosh
DOI:10.1055/s-0033-1339793
日期:——
A convenient and short methodology has been developed towards the synthesis of highly substituted phenanthridines and their analogous benzo[k] and benzo[i] derivatives in a single step viaSuzukicoupling and condensation between suitably substituted aromatic ortho-bromoaldehydes and ortho-aminobenzeneboronic acids in good to excellent yields.