摘要:
Methyl esters of 1-(1-bromocyclopentylcarbonyl)- and 1-(1-bromocyclohexylcarbonyl)cyclopentanecarboxylic or 1-(1-bromocyclopentylcarbonyl)cyclohexanecarboxylic acids react with zinc and aromatic aldehydes to form 14-aryl-13-oxadispiro[4.1.4.3]tetradecane-6,12-diones, 13-aryl-14-oxadispiro[4.1.5.3]pentadecane-6,15-diones, and 15-aryl-14-oxadispiro[4.1.5.3]pentadecane-6,13-diones, respectively.