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。
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.
Photochromism of dihydroindolizines part VII: multiaddressable photophysical properties of new photochromic dihydroindolizines bearing substituted benzo[i]phenanthridine as a fluorescing moiety
作者:Saleh Abdel-Mgeed Ahmed
DOI:10.1002/poc.1209
日期:2007.8
to green–blue colored betaines 7a-p after cooling with liquid nitrogen. The kinetics of the fast bleaching process of betaines 7a-p to DHIs 8a-p, studied by flash photolysis as well as low temperature FT-UV/VIS, were found to take place in the millisecond range (432–2675 ms) in dichloromethane solution and fitted well a first-order thermal back reaction. The fluorescence spectra as well as the fluorescence