The salenâTi complex catalyzed cyanation of nitroolefins was accomplished via the silyl nitronate intermediate for the synthesis of chiral β-nitronitriles with e.r. up to 92â:â8 and high yields (up to 90%). The catalyst also kept a high turnover frequency at room temperature. The yield and enantioselectivity of the protocol were slightly affected even in a 10 mmol scale.
通过
硝酸硅烷基
酯中间体催化
氰化硝基
烯烃,合成了手性δ-硝基腈,e.r. 高达 92â:â8,收率高达 90%。该
催化剂在室温下也能保持较高的翻转频率。即使在 10 毫摩尔的规模下,该方案的产率和对映体选择性也会受到轻微影响。