The present specification provides a total synthesis of known intermediates useful in the synthesis of khellin and antiatherosclerotic analogs thereof. 3-Furoic acid is treated with succinic anhydride and diesterified to 3-carb- oxy-8-oxo-2-furanbutanoic acid bis (alkyl ester). Following amination, cyclization and bis methylation, 6-formyl-4,7-dimethoxy-5-benzofurancarboxylic acid alkyl ester is prepared. This compound is then converted to known intermediates in the snythesis of khellin and analogs.
本说明书提供了一种用于合成
黄连素及其抗动脉粥样硬化类似物的已知中间体的全合成方法。3-
呋喃酸经
琥珀酸酐处理后,二酯化为 3- 碳氧-8-氧代-2-
呋喃丁酸双(烷基酯)。经过胺化、环化和双甲基化,制备出 6-甲酰基-4,7-二甲氧基-
5-苯并呋喃羧酸烷基酯。然后,这种化合物会转化为已知的黄柏苷和类似物合成中间体。