Enantiodivergent Aldol Condensation in the Presence of Aziridine/Acid/Water Systems
Keyword(s):
A series of novel chiral imines was synthesized from corresponding aldehydes and 1-(2-aminoalkyl)aziridines with good chemical yields. Such imines were tested as catalysts in the direct asymmetric aldol reaction between aromatic aldehydes and acetone/cyclohexanone in the presence of catalytic amounts of water and an acidic additive. The corresponding aldol products were formed in excellent yields and with very high enantioselectivities (98% and 99% ee, respectively).
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2018 ◽
Vol 3
(4)
◽
pp. 136-142