Synthesis and photo physical behavior of arylated benzenes cored with Push pull electronic system

Abstract

Synthetic organic chemistry is an advanced tool for synthesizing functionalized newlinebiaryls, teraryls and quateraryl derivatives shows adverse effects in the field of newlinematerials and medicinal chemistry. Simple 2-pyran and its complex structures are newlinecommon in most of the natural products shows miscellaneous biological activitxviies, newlinehas drawn much attention in the field of medicinal chemistry. Several classical and newlinenon-classical methods were adopted earlier to develop the versatility of synthesizing newlinefunctionalized biaryls, teraryls and quateraryls, Especially 2H-pyran-2-ones has newlinemarked an attention, because of the methodology and highly tolerable towards newlinevarious nucleophiles resulting in a wide range of molecules. 2-pyran exhibits three newlineelectrophilic centres suitable for the generation of various chemical entities such newlineas quinolones, quinolines, benzothiophenes, dibenzofurans, oxahelicenes, pyridines, newlinepyrazoles and other crowded benzenes under mild basic conditions. In our current newlineresearch work, we have synthesized the precursor 6-aryl-2H-pyran-2-ones under basic newlinecondition by treating carbon disulphide, ethyl cyanoacetate and dimethyl sulfate using newlinemethanol. Further, via carbanion induced ring transformation reaction of under newlinemild basic condition with various nucleophiles using DMF as a solvent. At first, newlineacyclic p-terphenyl with amine functionality was prepared by treating malononitrile newlinewith 6-aryl-2H-pyran-2-ones with using DMF and KOH isolated in moderate to newlinegood yield. Based on the optimized condition, various cyclic p-terphenyls were newlinesynthesized with cyclohexanone, 1,4-Cyclohexanedione monoethylene ketal, and 3- newlinephenylpropionaldehyde. Later on, 1,2,3,4-Tetrahydroquinolines were synthesized by newlinereacting functionalized 2H-pyran-2-ones with 3-oxo-piperidine-1-carboxylic acid tertbutyl newlineester. Similarly, few p-quateraryls were prepared using 1,4-dioxaspiro[4.5]decan- newline8-one and phenyl acetaldehyde as a carbanion source under the basic condition (KOH) newlinein DMF at room temperature. Further, optical properties and few optical