Tf-based sulfamide-amine alcohol-catalyzed enantioselective alkynylation of aldehydes
摘要:
A series of new chiral Tf-based sulfamide-amine alcohols (Tf-based SAA) were synthesized from natural chiral (-)-ephedrine and aziridines derived from commercially available chiral amino alcohols. Among these ligands, 3a was found to be more effective for the addition reaction of alkynylzinc to aromatic aldehyes at room temperature without using other kinds of metal species, providing 81-92% ee and up to 99% yields. (c) 2008 Elsevier Ltd. All rights reserved.
Methylsulfonyl-Based Sulfamide-Amine Alcohol as a Ligand for Enantioselective Alkynylation of Aldehydes
作者:Wei JIN、Yongbo HUANG、Boshun WAN
DOI:10.1016/s1872-2067(10)60106-4
日期:2010.1
Chiral methylsulfonyl-based sulfamide-amine alcohol (SAA) ligands were synthesized from commercially available starting materials in two simple steps Methylsulfonyl-based SAA ligands catalyzed the asymmetric alkynylation of various aldehydes using alkynylzinc to provide chiral propargyl alcohols with moderate to good enantioselectivity up to 83% ee