Tetrahedron Letters

Synthesis of (αR, βS)-epoxyketones by asymmetric epoxidation of chalcones with cinchona phase-transfer catalysts

MS Yoo, DG Kim, MW Ha, S Jew, H Park, BS Jeong

文献索引：Yoo, Mi-Sook; Kim, Dong-Guk; Ha, Min Woo; Jew, Sang-Sup; Park, Hyeung-Geun; Jeong, Byeong-Seon Tetrahedron Letters, 2010 , vol. 51, # 42 p. 5601 - 5603

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被引用次数: 20

摘要

An efficient method to synthetically produce optically enriched (αR, βS)-epoxyketones was developed using a quaternary ammonium salt derived from cinchona alkaloid as the chiral phase-transfer catalyst.(αR, βS)-Epoxyketones were prepared in high optical purities (91– 99% ee) by the asymmetric epoxidation of 1, 3-diarylenones with aqueous sodium hypochlorite in the presence of a hydrocinchonine-derived chiral phase-transfer catalyst ...