In the presence of triethylamine as catalyst, the one-pot four-component reactions of arylamines, methyl propiolate, isatin and malononitrile afforded the functionalized spiro[indoline-3,4'-pyridine] derivatives in good yields. Similar reactions with ethyl cyanoacetate successfully afforded the functionalized spiro[indoline-3,4'-pyridines] and spiro[indoline-3,4'-pyridinones] as the main produc...

Based on consecutive one-pot conditions combining three palladium-catalyzed reactions (Sonogashira, Heck and Suzuki-Miyaura reactions), a more efficient domino multicomponent method has been successfully developed to access a wide variety of 3-(diarylmethylene)oxindoles. Microwave irradiation and use of a silver salt were the most important factors to achieve high yields and stereoselectivity.

[equation: see text] An efficient one-pot route to unsymmetrical diorganyl selenides has been developed by ruthenium(III) chloride catalyzed reactions of dibenzyl or diphenyl diselenides with alkyl halides in the presence of zinc. Organic iodides, bromides, and activated chlorides underwent the reactions efficiently. Unreactive organic chlorides also underwent the same type of selenation with s...

A novel and efficient synthesis of 2-bromo(chloro)-3-selenyl(sulfenyl)indoles through tandem reactions of 2-(gem-dibromo(chloro)vinyl)-N-methylsulfonylanilines with diselenides and disulfides in the presence of t-BuOLi and I(2) (10 mol%) in DMSO was developed. The reactions generated the desired products in good yields with high regio-selectivity under transition-metal-free conditions in one-pot.

The presence of bisphenol A (BPA) in wastewater, its toxicity and the hardness for complete degradation constitutes a serious environmental problem scientific challenge. enzyme laccase is an oxidoreductase capable oxidizing phenolic compounds, being one most efficient biocatalysts BPA removal. immobilization laccases to lead solid essential their applications as it allows stabilization easy rec...