Optically active 2‐amino‐5‐oxo‐5,6,7,8‐tetrahydro‐4H‐chromene‐3‐carboxylates, 2‐amino‐5‐oxo‐5,6,7,8‐tetrahydro‐4H‐chromene‐3‐carbonitriles, and 2‐amino‐8‐oxo‐5,6,7,8‐tetrahydro‐4H‐chromene‐3‐carbonitriles were synthesized. Using cinchona alkaloid‐derived bifunctional catalysts, the corresponding 2‐amino‐4H‐chromene derivatives were obtained in high yields and moderate to high ee values (up to 82% ee)
光学活性的2-
氨基-5-氧代-5,6,7,8-四氢-4- ħ色烯-3-
羧酸盐,2-
氨基-5-氧代-5,6,7,8-四氢-4- ħ -合成了苯甲基-3-腈和2-
氨基-8-氧代5,6,7,8-四氢-4 H-苯甲基-3-腈。使用
金鸡纳
生物碱衍生的双官能催化剂,相应的2-
氨基-4- ħ以高产率获得和中度从1,3-之间串联迈克尔加成环化反应的高ee值的值(高达82%ee)的色烯衍
生物环己二酮或
1,2-环己二酮和(E)-3-芳基-
2-氰基丙烯酸酯或亚烷基
丙二腈衍
生物。