A new method for the α,α-dichlorination of β-keto esters using Oxone/aluminum trichloride mixture in aqueous medium has been developed. This useful process has also been applied successfully for the dichlorination of 1,3-diketones. The dichlorinated compounds have been produced in one step, high yields, and short reaction times.
Asymmetric Reduction of α,α‐Dichloro‐β‐Keto Esters by NADPH‐Dependent Ketoreductases
作者:Vasileios Giannopoulos、Ioulia Smonou
DOI:10.1002/ejoc.202200410
日期:2022.7.21
In this work a valuable enzymatic method for the stereoselective reduction of α,α-dichloro-β-keto esters was developed. Exclusively the (S)-α,α-dichloro-β-hydroxy esters have been produced using ketoreductases, exhibiting excellent enantioselectivities (>99 % ee) and high yields (conv. >99 %).
在这项工作中,开发了一种有价值的酶促方法,用于立体选择性还原 α,α-二氯-β-酮酯。仅使用酮还原酶生产( S )-α,α-二氯-β-羟基酯,表现出优异的对映选择性 (>99 % ee ) 和高产率 (conv. >99 %)。