Ruchi Chawla

A one-pot regioselective synthetic route to vinyl sulfones from terminal epoxides in aqueous media

A highly efficient LiBr catalysed regioselective synthesis of vinyl sulfones from readily available terminal epoxides and sodium sulfinates in a one-pot procedure using water as a reaction medium is reported. The protocol is adorned with several attributes of green chemistry like recycling of the catalyst, atom-economy and an aqueous medium.

Organocatalysis in synthesis and reactions of epoxides and aziridines

This review systematically describes the synthesis and reactions of epoxides and aziridines using organocatalysis, and includes their reactions like desymmetrization, regioselective nucleophilic ring-opening and cycloaddition with CO2. Based on the various generic modes of activation of organocatalysis, a systematic classification of organocatalysts used for regioselective nucleophilic ring-opening of epoxides and aziridines is given.

NHC-catalysed diastereoselective synthesis of multifunctionalised piperidines via cascade reaction of enals with azalactones.

NHC-catalysed azalactone ring-opening and piperidine ring-closing cascade with α,β-unsaturated aldehydes (enals) in a one-pot operation is reported. The present reaction cascade offers a convenient method for a highly diastereoselective synthesis of multifunctionalised piperidines in excellent yields under mild conditions.

Retracted article: Convenient access to strained trisubstituted 2-azetines from enals and chloramine-T in aqueous media

We, the named authors, hereby wholly retract this Green Chemistry article due to subsequent realisation of the incorrect assignment of the structures in the paper. Signed: Atul K. Singh, Ruchi Chawla and Lal Dhar S. Yadav, February 2013Retraction endorsed by Sarah Ruthven, Managing Editor, Green Chemistry