DABCO-Induced [2+2+2]-Cycloaddition Reaction of Ethyl Propiolate and Aryl Aldehydes for the Synthesis of 4-Aryl-4H-pyrans

[摘要]：The first DABCO-induced [2+2+2]-cycloaddition reaction of ethyl propiolate and aryl aldehydes is reported for selectively constructing 4-aryl-4H-pyrans in moderate to good yields.

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