ETUDE DE CYCLOADDITIONS AUX ALLENES GEM-DIACTIVES PAR DEUX GROUPES ELECTROATTRACTEURS

Article abstract of DOI:10.1016/S0040-4020(01)96559-7

Allenes, when they have two electron-withdrawing groups on the same carbon, are closely related to ketenes and can be used as synthetic equivalents of these compounds.Several synthetic approaches are investigated, such as dehydrohalogenation reactions, and an analogue of the Wolff transposition of diazoketones.These allenes undergo readily cycloadditions with imines and diazoalkanes, leading to equivalents of β-lactams and cyclobutanones.