Abstract
Two new organocatalysts 3a and 3b, derived from L-leucine and (S)-β-amino alcohols that were prepared from L-valine, were designed and afforded the direct syn-aldol reactions of a wide scope of aldehydes with various ketones with an excellent diastereomeric ratio of up to >20/1 and enantioselectivities of up to 99% ee.
Original language | English (US) |
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Pages (from-to) | 4247-4249 |
Number of pages | 3 |
Journal | Organic Letters |
Volume | 9 |
Issue number | 21 |
DOIs | |
State | Published - Oct 11 2007 |