The cycloadditions of a series of 4H-pyran-4-ones
3c–e with electron-rich dienes 11a,b to give reduced flavones 12
is described. The subsequent reactions of these reduced flavones with
HCl, trifluoroacetic anhydride, ethyl anthranilate 19a and
anthranilonitrile 19b is also described.
描述了一系列4H-
吡喃-4-酮(3c-e)与富电子二烯(11a,b)进行环加成反应,生成还原型
黄酮(12)的过程。随后,这些还原型
黄酮与
盐酸、
三氟乙酸酐、乙基
邻氨基苯甲酸酯(19a)和邻
氨基苯腈(19b)的反应也被描述。