Enantioselective mono‐fluorination of α‐keto esters was achieved using a mildly basic palladium μ‐hydroxo complex as catalyst. Subsequent one‐pot reduction afforded optically active β‐fluoro‐α‐hydroxy esters. These compounds were then converted into β‐fluoro‐α‐amino esters, which are potentially useful in medicinal chemistry research.
Biocatalytic Asymmetric Construction of Secondary and Tertiary Fluorides from β‐Fluoro‐α‐Ketoacids**
作者:Jason Fang、Laura E. Turner、Michelle C. Y. Chang
DOI:10.1002/anie.202201602
日期:2022.5.16
Biocatalytic asymmetric synthesis of secondary and tertiary fluorides is performed by the pyruvate aldolase HpcH and its engineered variants, utilizing β-fluoro-α-ketoacids as non-native donor substrates. Rationalization of beneficial mutations and optimization of reaction conditions allowed for the chemoenzymatic preparation of fluorinated synthons with relevance to bioactive natural products and