Highly Enantioselective Synthesis of Fluorinated β-Amino Ketones via Asymmetric Organocatalytic Mannich Reactions: A Case Study of Unusual Reversal of Regioselectivity
作者:Guofu Zhong、Min Lu、Yunpeng Lu、Puay Tan、Qiu Lau
DOI:10.1055/s-0030-1259513
日期:2011.3
The highly enantioselective direct Mannich protocol employing fluoroacetone, p-anisidine, and aldehydes catalyzed by 4-siloxyproline was developed, allowing efficient access for pharmaceutically important fluorinated β-amino ketones. On the basis of DFT calculations and mechanistic probes, the origin of an unusual reversal of regioselectivity was unraveled.
开发了采用氟丙酮、对茴香胺和由 4-甲硅烷氧基脯氨酸催化的醛的高度对映选择性直接曼尼希方案,允许有效获取药学上重要的氟化 β-氨基酮。在 DFT 计算和机械探针的基础上,揭示了区域选择性异常逆转的起源。