A New Reaction System for Horner-Wadsworth-Emmons Olefination of Optically Active 4-Hydroxy-2-oxo-alkylphosphonates and 4-Hydroxy-1-chloro-2-oxo-alkylphosphonates with Aliphatic Aldehydes<sup />
作者:Chengye Yuan、Chengfu Xu
DOI:10.1055/s-2004-831193
日期:——
A new and convenient reaction system is described for the synthesis of chiral β'-hydroxy-α,β-unsatuarated ketones based on the Horner-Wadsworth-Emmonsolefination of optically active 4-hydroxy-2-oxo-alkylphosphonates and 4-hydroxy-1-chloro-2-oxo-alkylphosphonates with aliphatic aldehydes.
Enzymatic synthesis of optically active α-chloro-δ-hydroxy-β-ketoalkanephosphonates and reactions thereof
作者:Chengfu Xu、Chengye Yuan
DOI:10.1016/j.tet.2004.02.073
日期:2004.4
A novel and enzymatic approach to α-chloro-δ-hydroxy-β-ketoalkanephosphonates was developed via enantioselective CALB-catalyzed acetylation and CRL-catalyzed hydrolysis. The resultant opticallyactive compounds provide, via Horner–Wadsworth–Emmons (HWE) reaction, chiral α,β-unsaturated ketones that are building block with potential application in organic synthesis.