Lewis acid-mediated reactions of 1-cyclopropyl-2-arylethanone derivatives with diethyl 2-oxomalonate and ethyl 2-oxoacetate

Lewis acid-mediated reactions of 1-cyclopropyl-2-arylethanone derivatives with diethyl 2-oxomalonate and ethyl 2-oxoacetate have been investigated and the corresponding functionalized 1,6-dioxa-spiro[4.4]non-3-en-2-one derivatives were formed in moderate to excellent yields via a tandem reaction process.