Enantioselective Aza-Henry Reaction with an <i>N</i>-Sulfinyl Urea Organocatalyst
作者:MaryAnn T. Robak、Monica Trincado、Jonathan A. Ellman
DOI:10.1021/ja075653v
日期:2007.12.1
simultaneously acidify the urea and provide asymmetric induction in hydrogen-bond-catalyzed reactions. The utility of this new catalyst structure is demonstrated by the high selectivity provided in the aza-Henry reaction not only for aromatic N-Boc imine substrates but also for aliphatic imines for which enantioselective H-bonding catalysis has not previously been demonstrated.
已经开发出一类新的有机催化剂,它结合了亚磺酰基作为脲或硫脲取代基。亚磺酰基同时用于酸化尿素并在氢键催化反应中提供不对称诱导。这种新催化剂结构的实用性通过 aza-Henry 反应提供的高选择性得到证明,不仅对芳香族 N-Boc 亚胺底物,而且对脂肪族亚胺(之前尚未证明对映选择性氢键催化)。