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Browsing by Author "Manojkumar, P"

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N-heterocyclic carbene catalyzed reaction of enals and 1,2-dicarbonyl compounds: Stereoselective synthesis of spiro gamma-butyrolactones

Vijay Nair, G; Sreekumar, V; Manojkumar, P; Resmi Mohan; Suresh, E (American Chemical Society, 2006)

Nucleophilic heterocyclic carbene (NHC) catalyzed annulation of enals and cyclic 1,2-dicarbonyl compounds, opening a route to gamma-spirolactones, has been observed for the first time. The strategy works well with isatins, ...
An N-heterocyclic carbene-catalyzed [8+3] annulation of tropone and enals via homoenolate

Vijay Nair, G; Manojkumar, P; Sreekumar, V; Suresh, E; Rajasekaran, T (American Chemical Society, 2006)

A novel protocol for the annulation of tropone to enals involving nucleophilic heterocyclic carbene (NHC) catalyzed homoenolate formation has been developed. Interestingly, the reaction led to bicyclic delta-lactones instead ...
N-heterocyclic carbene-catalyzed reaction of chalcones and enals via homoenolate: an efficient synthesis of 1,3,4-trisubstituted cyclopentenes

Vijay Nair, G; Sreekumar, V; Manojkumar, P; Suresh, E (American Chemical Society, 2006)

Nucleophilic heterocyclic carbene-catalyzed cyclopentannulation of enals and chalcones via homoenolate has been observed for the first time. Serendipitously, the reaction lead to a very efficient synthesis of 3,4-trans-d ...
Reaction of dimethoxycarbene-DMAD zwitterion with 1,2-diones and anhydrides: A novel synthesis of highly substituted dihydrofurans and spirodihydrofurans

Vijay Nair, G; Ani Deepthi; Manojkumar, P; Bindu, S; Sreekumar, V; Beneesh, P B; Resmi Mohan; Suresh, E (American Chemical Society, 2006)

The zwitterion formed by the reaction of dimethoxycarbene and DMAD adds efficiently to one of the carbonyl groups of 1,2-dicarbonyl compounds and anhydrides to generate dihydrofurans and spirodihydrofurans in good yields. ...

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