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[摘要]：Condensation reactions of glyoxal with p-substituted phenol derivatives 1a-f have been carried out and the corresponding 5a,10b-dihydrobenzofuro[2,3-b]benzofuran 4a-f type compounds were obtained in good to excellent yields. The resulting dimeric products carrying methyl groups 4a-d were converted to the corresponding carboxylic acid derivatives as the new polymer forming monomers. Many of these reactions gave novel structures. No definite product was obtained by the similar reactions of glyoxal with thiophenol and aniline in place of phenols. |
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