Determination of microplastic content in freshwater lakes in western Tennessee

Fused pyridines are widely applicable in various fields of medicinal chemistry. Last years different biological activities as antidepressants, antiallergics, antidiabetics, antihistaminics and so on are shown for them. Most of hits contained heterocycles annelated to the pyridineu2019s core. The problematic of the functionalization of such type of compounds very often solved on the heterocyclization stage. The methodology for producing of heteroannelated 3-cyanopyridines based on the cyclization reaction of diverse aminoheterocycles with sodium 2-cyano-2-(dimethoxymethyl)eth-1-en-1-olate 1 were elaborated and adapted for multigram scale.In this report, the synthesis of starting reagent sodium 2-cyano-2-(dimethoxymethyl)eth-1-en-1-olate in kilo scale is elaborated. The synthetic methodology for the cyclization is validated and optimized. The advantages and scope and limitation of the procedure are determined and will be discussed.