data140303

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Triethylamine Hydroiodide as a Simple Yet Effective Bifunctional Catalyst for CO₂ Fixation Reactions with Epoxides under Mild Conditions

An efficient synthesis of cyclic carbonates from epoxides and CO₂ under mild reaction conditions was achieved via the use of triethylamine hydroiodide as a simple yet effective bifunctional catalyst. The importance of the bifunctional feature of the catalyst was clearly demonstrated in the present work via control experiments and ¹H NMR studies. The scalability of this catalytic system was also demonstrated

Photocatalytic One-Pot Synthesis of Homoallyl Ketones via a Norrish Type I Reaction of Cyclopentanones

A photocatalytic synthesis of homoallyl ketones was achieved via a one-pot procedure starting from a Norrish Type I reaction of cyclopentanones, followed by a decatungstate-catalyzed hydroacylation of electron-deficient olefins by the resulting 4-pentenals. The site-selective formyl H-abstraction in the second step can be explained by radical polar effects in the transition state

Photocatalyzed Site-Selective C–H to C–C Conversion of Aliphatic Nitriles

β- or γ-Site-selective C–H alkylation of aliphatic nitriles has been achieved using a decatungstate salt as the photocatalyst. The observed site selectivity was justified by a radical polar effect in transition states for hydrogen abstraction