Copper-catalyzed addition of water affording highly substituted furan and unusual formation of naphthofuran ring from 3-(1-alkenyl)-2-alkene-1-al
作者:Rathin Jana、Sunanda Paul、Anup Biswas、Jayanta K. Ray
DOI:10.1016/j.tetlet.2009.10.125
日期:2010.1
We have developed a novel one-pot reaction to generate highly substituted furan through the addition of water followed by oxidation and unusual cyclization to naphthofuran ring under the same reaction condition.
An efficient synthetic protocol of pyrroles and isoquinolines through NaN3/NH4Cl promoted intramolecular aza-annulation of formyl group with suitable alkenes or alkynes is described in high yield and regioselectivities. The metal free exo-trig and endo-dig aza-cyclisation has been extended for the synthesis of bicyclic or tricyclic pyrroles along with environment sensitive fluorescent isoquinoline
Microwave assisted [RuCl<sub>2</sub>(p-cymene)<sub>2</sub>]<sub>2</sub> catalyzed regioselective endo-tandem cyclization involving imine and alkyne activation: an approach to benzo[4,5]imidazo[2,1-a]pyridine scaffold
作者:Sudipta Kumar Manna、Gautam Panda
DOI:10.1039/c4ra02581d
日期:——
A microwave assisted efficient route to the synthesis of benzimidazole fused heterocycles through metal catalyzed endo-cyclization strategy involving imine and alkyne activation has been developed.
通过金属催化的内环化策略,利用微波辅助高效合成苯并咪唑融合杂环的方法已经开发出来。
Urea‐Promoted Neat Synthesis of Fused Dihydroisoquinolines and Disubstituted Pyridines: A Mechanistic Observation with Molecular‐Sensing Studies
A concise and efficient synthesis of fused isoquinolines has been established by using an environmentally friendly neat approach. In this method, the electrocyclic reaction is emphasized over the typical aza-Michael addition. This green methodology allows the synthesis of various isoquinolines, including the alkaloid decumbenine B and a fluorophore that selectively detects picric acid.
通过使用环境友好的纯净方法,建立了稠合异喹啉的简洁有效的合成方法。在该方法中,电环反应比典型的氮杂迈克尔加成更重要。这种绿色方法可以合成各种异喹啉,包括生物碱 decumbenine B 和选择性检测苦味酸的荧光团。