Highly Enantioselective Henry Reactions in Water Catalyzed by a Copper Tertiary Amine Complex and Applied in the Synthesis of (S)-N-trans-Feruloyl Octopamine
作者:Guoyin Lai、Fengfeng Guo、Yueqin Zheng、Yang Fang、Haigang Song、Kun Xu、Sujing Wang、Zhenggen Zha、Zhiyong Wang
DOI:10.1002/chem.201002915
日期:2011.1.24
It's in the water! A new coppertertiaryaminecomplex was prepared and applied in asymmetric Henryreactions in water and in the short synthesis of (S)‐N‐trans‐feruloyl octopamine. This catalytic system provided an approach to the enantioselectiveHenryreaction of aldehydes with hydroxyl substituents (see graphic).
A New Catalyst for the Asymmetric Henry Reaction: Synthesis of β-Nitroethanols in High Enantiomeric Excess
作者:James D. White、Subrata Shaw
DOI:10.1021/ol3030023
日期:2012.12.21
has been designed and synthesized from cis-2,5-diaminobicyclo[2.2.2]octane. The complex generated in situ by the interaction of the ligand with (CuOTf)2·C6H5CH3 was an efficient catalyst for the asymmetric Henry reaction, producing nitroaldol products in high yield and good stereoselectivity. Henry reactions catalyzed by this tetrahydrosalen-Cu(I) complex led to syntheses of β-adrenergic blocking agents
从顺-2,5-二氨基双环[2.2.2]辛烷设计并合成了一种新的手性四氢salen配体。通过配体与(CuOTf)2 ·C 6 H 5 CH 3的相互作用原位生成的配合物是用于不对称亨利反应的有效催化剂,可以高收率和良好的立体选择性生产硝基醛醇产物。该四氢salen -Cu(I)配合物催化的亨利反应导致β-肾上腺素能阻断剂(S)-甲苯酚,(S)-莫普洛尔和(S)-丙醇的合成。
Per-6-amino-β-cyclodextrin as a Reusable Promoter and Chiral Host for Enantioselective Henry Reaction
A highly efficient enantioselective Henry reaction has been carried out using per-6-ABCD as a supramolecular chiral host and promoter to give the corresponding adduct with high yield (up to 99%) and enantiomeric excess (up to 99%). Per-6-ABCD also promotes the diastereoselective Henry reaction in a syn-selective manner to give the adduct up to 99% yield with 99:1 syn/anti selectivity. The enantiomeric excess of the syn-adduct is 99%. The catalyst is recovered and reused without loss in its activity.