Asymmetric trialkylaluminium addition to aldehydes catalyzed by titanium complexes of N-sulfonylated amino alcohols with two stereogenic centers.
The asymmetric methylation, ethylation and allylation of aldehydes using trialkylaluminium reagents catalyzed by titanium(IV) complexes of N-sulfonylated amino alcohols gave excellent enantioselectivities of up to 99% ee.
You
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Department of Chemistry, National Chung-Hsing University, Taichung, Taiwan 402. hmgau@dragon.nchu.edu.tw
Hsieh
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Gau
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