1-Acetyl-3-oxo-2,3-dihydroindoles were reacted with substituted benzaldehydes affording 1-acetyl-2-arylmethylene-3-oxo-2,3-dihydroindoles which were selectively reduced by hydrogen; then a Horner-Emmons reaction gave the precursors of 2-substituted tryptamines. Nitromethane was added to 1-acetyl-2-arylmethylene-3-oxo-2,3-dihydroindoles giving Michael addition products.
1-乙酰基-3-氧代-2,3-二氢
吲哚与取代
苯甲醛反应,生成1-乙酰基-2-芳基亚甲基-3-氧代-2,3-二氢
吲哚,随后通过
氢气选择性还原;然后进行Horner-Emmons反应得到2-取代色
氨酸的前体。向1-乙酰基-2-芳基亚甲基-3-氧代-2,3-二氢
吲哚中加入
硝基甲烷,得到迈克尔加成产物。