Aldolization reactions of 1-acetyl-1H-indol-3(2H)-one with glyoxal derivatives afforded (1-acetyl-3-oxo-2,3-dihydro-1H-indol-2-ylidene)acetic acid ester derivatives 2 and 3. Spiro compounds 6 were obtained by Diels-Alder reactions of 2; inverse electron demand Diels-Alder reactions of 2 afforded pyrano indoles 8.
1-乙酰基-1H-
吲哚-3(2H)-酮与醛二醛衍
生物的阿尔多反应生成了(1-乙酰基-3-氧基-2,3-二氢-1H-
吲哚-2-亚烯基)
醋酸酯衍
生物2和3。通过2的迪尔斯-阿尔德反应得到了螺旋化合物6;2的反向电子需求迪尔斯-阿尔德反应生成了
吡喃
吲哚8。