<EM EMTYPE="ITALIC">trans</EM>-4-Hydroxy-<EM EMTYPE="CAPS">l</EM>-proline Hydrazide-Trifluoroacetic Acid as Highly Stereoselective Organocatalyst for the Asymmetric Direct Aldol Reaction of Cyclohexanone
摘要：
Protonated N′-benzyl-N′-l-prolyl-trans-4-hydroxy-l-proline hydrazide has been found to be superior to the l-proline hydrazide counterpart as the catalyst for the asymmetric aldol reaction of cyclohexanone and aromatic aldehydes, resulting in excellent diastereoselectivities (up to >99:1 dr) and enantioselectivities (up to >99% ee).
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年份：
2009
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