Catalytic Asymmetric Addition of Alkylzinc and Functionalized Alkylzinc Reagents to Ketones
作者:Sang-Jin Jeon、Hongmei Li、Celina García、Lynne K. LaRochelle、Patrick J. Walsh
DOI:10.1021/jo048683e
日期:2005.1.1
We describe our full report of the catalytic asymmetricaddition of simple and functionalized dialkylzinc reagents to a broad range of saturated ketones and enones. The functionalized organozinc reagents contain esters, silyl ethers, alkyl chlorides, and alkyl bromides. In general, the resulting tertiary alcohol products are isolated with high ee's. With some substrates, yields are low as a result
DIASTEREOFACE-DIFFERENTIATING ADDITION OF ORGANOMETALLICS TOWARD CHIRAL α-KETOENAMINES
作者:Tamotsu Fujisawa、Makoto Watanabe、Toshio Sato
DOI:10.1246/cl.1984.2055
日期:1984.12.5
The diastereoface-differentiating reaction of Grignard reagents or organolithium reagents toward chiral cyclic α-ketoenamines, prepared from the corresponding cycloalkane-1,2-dione and optically active pyrrolidine derivatives, was found to give, after hydrolysis, (R)- or (S)-α-hydroxycycloalkanones, respectively, in high enantiomeric excess.