Rh<sub>2</sub>
(<i>S</i>
-1,2-NTTL)<sub>4</sub>
: A Novel Rh<sub>2</sub>
(<i>S</i>
-PTTL)<sub>4</sub>
Analog With Lower Ligand Symmetry for Asymmetric Synthesis of Chiral Cyclopropylphosphonates
作者:Frady G. Adly、Johncarlo Maddalena、Ashraf Ghanem
DOI:10.1002/chir.22349
日期:2014.11
2‐naphthaloyl‐(S)‐amino acid ligands. In terms of enantioselectivity, Rh2(S‐1,2‐NTTL)4 (3a) derived from N‐1,2‐naphthaloyl‐(S)‐tert‐leucine, was the best‐performing catalyst among the new series in the enantioselective synthesis of cyclopropylphosphonate derivatives (up to >99% enantiomeric excess). A predictive model was proposed to justify the observed high enantiomeric induction exhibited by Rh2(S‐1,2‐NTTL)4
从N - 1,2-萘基- (S)-氨基酸配体衍生出一系列新的四羧酸二(II)铑(II)。就对映选择性而言,衍生自N -1,2-萘基- (S)-叔亮氨酸的Rh 2(S -1,2-NTTL)4(3a)是新系列中性能最佳的催化剂。环丙基膦酸酯衍生物的对映选择性合成(对映体过量高达> 99%)。提出了一个预测模型来证明观察到的高价对映体诱导与供体-受体膦酸酯类化合物Rh 2(S -1,2-NTTL)4表现出来。手性26:764–774,2014。©2014 Wiley Periodicals,Inc.