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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Asymmetric Reduction of #alpha#-Keto Esters and #alpha#-Diketones with a Bakers' Yeast Keto Ester Reductase
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Asymmetric Reduction of #alpha#-Keto Esters and #alpha#-Diketones with a Bakers' Yeast Keto Ester Reductase

机译:贝克酵母酮酮酯还原酶对#alpha#-酮酯和#alpha#-二酮的不对称还原

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摘要

Optically pure #alpha#-hydroxy esters and #alpha#-hydroxy ketones have been synthesized by the reduction of the corresponding ketones with a keto ester reductase isolated from bakers' yeast (YKER-I). The reduction of #alpha#-keto esters affords the corresponding (S) -or (R)-hydroxy esters selectively, where the stereochemical course depends on the chain length of the alkyl substituent on the carbonyl group. An #alpha#-veto alkanoic ester affords the corresponding (S)-hydroxy ester, whereas a long alkanoate yields the corresponding (R)-hydroxy ester. The reduction of #alpha#-diketones affords the corresponding (S)-2-hydroxy ketones regio-and stereo selectively.
机译:通过用从面包酵母中分离的酮酯还原酶(YKER-1)还原相应的酮,已经合成了光学纯的#α#-羟基酯和#α#-羟基酮。 #α#-酮酯的还原选择性地提供相应的(S)-或(R)-羟基酯,其中立体化学过程取决于羰基上烷基取代基的链长。 -α-否决链烷酸酯提供相应的(S)-羟基酯,而长链烷酸酯产生相应的(R)-羟基酯。 #α#-二酮的还原选择性地提供相应的(S)-2-羟基酮区域和立体。

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