Synthesis of substituted diphenyl ethers using the Diels–Alder reaction
Abstract
The phenoxyfurans (4) and (8) undergo a Diels–Alder reaction with dimethyl acetylenedicarboxylate (DMAD) to give the cycloadducts (5) and (9) which can be converted into the substituted diphenyl ethers (6) and (10) respectively.