期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 132, 期 23, 页码 7890-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja102555a
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资金
- JSPS
- University of Tokyo, MEXT, Japan
Catalytic asymmetric protonation of chiral calcium enolates was performed. Chiral calcium enolates, prepared in situ from imides and malonates via 1,4-addition in the presence of catalytic amounts of Ca(OEt)(2), Ph-PyBox, and achiral phenol, were smoothly protonated to afford adducts bearing tertiary asymmetric carbons in high yields with high enantioselectivities. The adducts were readily converted to optically active 2-substituted 1,5-dicarboxylic acid derivatives.
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