Abstract
Ethyl vinyl ether was found to be an appropriate synthetic equivalent of acetylene for a set of Diels–Alder reactions with fused pyran-2-ones that yield fused carbocyclic systems. Transformations were conducted under microwave irradiation with DABCO (as a catalyst for the elimination of ethanol) and with n-butanol as the additive. A single-crystal X-ray diffraction structure is presented for N-(5,6,7,8-tetrahydro-6-methyl-8-oxonaphthalen-2-yl)benzamide.
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