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.
Palladium-catalyzed one-pot Suzuki coupling followed by arylpalladium addition to aldehyde: a convenient route to fluoren-9-one derivatives
作者:Sunanda Paul、Shubhankar Samanta、Jayanta K. Ray
DOI:10.1016/j.tetlet.2010.08.062
日期:2010.10
Various fluoren-9-one derivatives were prepared efficiently by a one-pot reaction involving sequential Suzuki coupling of 2-bromophenyl boronic acid with 2-bromocarboxaldehyde followed by intramolecular arylpalladium addition to aldehyde.
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.
eco-friendly neat synthesis of isothiazoles has been developed for the first time. It is noteworthy that an instantaneous valuable synthetic route of β-enaminones has also been documented during the mechanistic investigation of isothiazole formation. Detail mechanistic explanation of isothaizole formation reaction is clearly explained by the control experiments. NBS promoted aromatisation of isothiazole derivatives