Pd. Wilson et al., SUCCESSIVE ELECTROCYCLIC REARRANGEMENTS INITIATED BY THE ADDITION OF A LITHIATED GYCLOPROPENONE ACETAL TO A SQUARATE ESTER, Journal of the Chemical Society, Chemical Communications, (13), 1995, pp. 1351-1352
The ability of a cyclopropenone acetal to trigger a reaction cascade f
ollowing nucleophilic addition to diisopropyl, squarate is illustrated
with three different examples.