A carbanion induced synthesis of highly congested pyrazole and imidazole containing heterocycles
                                
                                    
                                        作者:Hardesh K. Maurya、Atul Gupta                                    
                                    
                                        DOI:10.1016/j.tetlet.2014.01.095
                                    
                                    
                                        日期:2014.3
                                    
                                    An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions. (C) 2014 Elsevier Ltd. All rights reserved.