Chiral Brønsted Acid Catalyzed Stereoselective Addition of Azlactones to 3-Vinylindoles for Facile Access to Enantioenriched Tryptophan Derivatives
作者:Masahiro Terada、Kenichi Moriya、Kyohei Kanomata、Keiichi Sorimachi
DOI:10.1002/anie.201105562
日期:2011.12.23
Syn‐gled out: The syn diastereo‐ and enantioselective addition of azlactones to 3‐vinylindoles was accomplished by using a chiral, binapthol‐derived, Brønsted acid catalyst (see scheme). This method enables facile access to tryptophan derivatives with adjacent quaternary and tertiary stereogenic centers, which are potentially useful for the synthesis of peptidomimetics.
SYN-GLED出:在S炔diastereo-和对映选择性加成到吖内酯3- vinylindoles的通过使用手性,binapthol衍生的,布朗斯台德酸催化剂(参见方案)来完成。该方法使得能够容易地与相邻的季和三次立体发生中心接近色氨酸衍生物,这对于合成拟肽可能有用。