A new and highly versatile approach towards the synthesis of bicyclo[6.3.0]undecanes and bicyclo[5.3.0]decanes was accomplished. The methodology adopted involved [6+3] and [3+2] cycloaddition reactions of pentafulvenes ...

A facile tertiary amine‐mediated [2+2] annulation reaction of 3‐alkyl allenoates, and diaryl 1,2‐diones leading to diastereoselective synthesis of highly substituted alkylene‐oxetane derivatives is reported. The reaction ...

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 ...

An activation of the pyridine nucleus has been achieved via 1,5-electrocyclization of vinyl pyridinium ylides generated from bromo isomerized Morita-Baylis-Hillman adducts of isatin and pyridine under basic conditions. The ...

Montmorillonite K10 clay promoted one-pot synthesis of penta- and tetracyclic systems from Baylis-Hillman adduct of heteroaldehydes with azomethine ylides generated from ninhydrin and proline or sarcosine via [3+2] ...

Facile synthesis of fused 1,2,3-triazoles by a proline-catalyzed reaction of an azido aldehyde and a nitroalkane is elaborated. The present tandem protocol proceeds via an organocatalytic Knoevenagel condensation of the ...