Ryoichi Ando

One-pot synthesis of substituted cyclopropenone ketals via alkylation of 3,3-dialkoxy-2-sodiocyclopropenes

Abstract A variety of substituted cyclopropenone ketals have been prepared by electrophilic trapping (protonolysis and alkylation) of sodium salts of cyclopropenone ketals that have been generated directly from the ketals of 1,3-dichloroacetone derivatives through cyclization with NaNH 2 in a liq. NH 3 /ether mixture.

Reactions of active methyne compounds with vinyl selenones. One-step synthesis of 2-acylcyclopropanecarbaldehydes

The reactions of anionic species of 2-substituted 1,3-dicarbonyl compounds with vinyl selenones afford the corresponding 1,2-diacylcyclopropanes in good yields through conjugate and 1,2-addition reactions followed by rearrangement and substitution processes.