Stereodivergent Direct Catalytic Asymmetric Mannich-Type Reactions of α-Isothiocyanato Ester with Ketimines
作者:Gang Lu、Tatsuhiko Yoshino、Hiroyuki Morimoto、Shigeki Matsunaga、Masakatsu Shibasaki
DOI:10.1002/anie.201101034
日期:2011.5.2
Now accessible: Sterically hindered vicinal tetrasubstituted carbon stereocenters, which are not accessible by asymmetric hydrogenation, were constructed by a catalytic asymmetric CC bond formation (see scheme; Dpp=diphenylphosphinoyl). By changing the Group 2 metal center, stereodivergent access to α,β‐tetrasubstituted α,β‐diamino esters was realized.
现在可访问:空间位阻的邻位碳四取代立构,这是不通过不对称氢化访问,通过一个催化不对称ç构造 C键的形成(参见方案的DPP = diphenylphosphinoyl)。通过更改第2组金属中心,可以实现立体分散地使用α,β-四取代的α,β-二氨基酯。