Organocatalyzed Enantioselective Synthesis of 2-Amino-4<i>H</i>-chromene Derivatives
作者:Naresh Ramireddy、Santhi Abbaraju、Derong Ding、Hadi Arman、John C.-G. Zhao
DOI:10.1002/jhet.2641
日期:2017.1
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。