Synthesis and reactions of hydroxyspiro[5.2]cyclooctenones based on the cyclization of the dianions of acetone and diethyl 2-oxopropylphosphonate with 1,1-diacylcyclopropanes

摘要

The cyclization of the dianions of diethyl 2-oxopropylphosphonate and of acetone with 1,1-diacylopropanes afforded hydroxy-spiro[5.2]cyclooctenones which were transformed,by homo-Michael reactions with tetrabutylammonium halides,into various function-alized phenols or their dimers.