92703-13-4Relevant articles and documents
Uncatalyzed, solvent-free [2+2] cycloaddition of cyclic ketene trimethylsilyl acetals with electrophilic acetylenes
Miesch, Michel,Wendling, Florence
, p. 3381 - 3392 (2007/10/03)
Cyclic ketene trimethylsilyl acetals reacted with electrophilic acetylenes (ethyl propynoate, dimethyl acetylenedicarboxylate and ethynyl methyl ketone) to afford the corresponding [2+2] cycloadducts. The reactions were run at room temperature, without a catalyst and under solvent-free conditions. α-Alkylidenelactones, β-oxocyclobutanecarboxylates and substituted furan derivatives proved to be readily available from the [2+2] cycloadducts by treatment either with TBAF in THF solution or with BF3·Et2O.