(i) Direct aldol reactions proceeded in 1,2-dichloroethane using simple procedures. (ii) Direct S -acylation of cysteine to give organocatalysts 1a – f can be economically carried out easily in a single step from commercially available sources, with both enantiomers being readily available. (iii) 5 mol% catalyst 1e was sufficient to furnish the aldol products in excellent yields (up to 93%) and enantioselectivities (up to 99%). (iv) Catalyst 1e could be easily recovered and reused, and also can be efficiently used in large-scale reactions with enantioselectivity being maintained at the same level, which offers great possibility for applications in industry.(Figure not available: see fulltext.)
Research on Chemical Intermediates – Springer Journals
Published: Jun 15, 2011
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