Oxy-substituted homophthalic anhydrides have been synthesized by cycloaddition
of di- and tri-oxy butadienes to the allenic diester (1). By base-catalysed
cycloaddition to appropriate benzoquinones they have afforded new syntheses of
viocristin (19), isoviocristin (20) and analogous 1,4-anthraquinones. Related
chemistry has led to the naphthalene (34) and the anhydride (35),
intermediates in published syntheses of semivioxanthin and 6-
methylpretetramid respectively.
氧代均苯二甲酸酐是通过二氧和三氧丁二烯与异链二酯(1)的环加成反应合成的。
将二氧基和三氧基丁二烯环加成均苯二甲酸酯 (1)。通过碱催化
通过与适当的苯醌进行环加成,他们合成了新的
viocristin (19)、isoviocristin (20) 和类似的 1,4-anthraquinones 的新合成。相关的
萘(34)和酐(35)、
的中间体。
萘 (34) 和酸酐 (35),它们分别是已发表的半二氧杂蒽和 6-甲基维甲酸合成的中间体。