手性氢供体催化剂的开发是通过对映选择性氢原子转移(HAT)过程扩展和创新不对称有机催化反应的基础。在此,开发了一种前所未有的手性C 2 -对称芳硫醇催化剂,其衍生自容易获得的对映体乳酸酯。利用这些催化剂,建立了不对称反马尔可夫尼科夫烯烃氢胺化环化反应,提供了多种具有中等到高对映选择性的药学上有趣的3-取代哌啶。设计的对照实验和理论计算的结果合理化了立体控制的起源,并揭示了手性硫醇部分对对映选择性的空间效应。我们相信这些催化剂的简便合成、灵活可调性和有效的对映选择性控制能力将为多功能手性 HAT 催化剂和相关不对称反应的开发提供线索。
手性氢供体催化剂的开发是通过对映选择性氢原子转移(HAT)过程扩展和创新不对称有机催化反应的基础。在此,开发了一种前所未有的手性C 2 -对称芳硫醇催化剂,其衍生自容易获得的对映体乳酸酯。利用这些催化剂,建立了不对称反马尔可夫尼科夫烯烃氢胺化环化反应,提供了多种具有中等到高对映选择性的药学上有趣的3-取代哌啶。设计的对照实验和理论计算的结果合理化了立体控制的起源,并揭示了手性硫醇部分对对映选择性的空间效应。我们相信这些催化剂的简便合成、灵活可调性和有效的对映选择性控制能力将为多功能手性 HAT 催化剂和相关不对称反应的开发提供线索。
Direct Catalytic Anti-Markovnikov Hydroetherification of Alkenols
作者:David S. Hamilton、David A. Nicewicz
DOI:10.1021/ja309635w
日期:2012.11.14
A direct intramolecular anti-Markovnikov hydroetherification reaction of alkenols is described. By employing Catalytic quantities of commercially available 9-mesityl-10-methylacridinium perchlorate and 2-phenyl-malononitrile as a redox-cycling source of a H-atom, we report the anti-Markovnikov hydroetherification of alkenes with complete regioselectivity, In addition, we present results demonstrating that this novel catalytic system can be applied to the anti-Markovnikov hydrolactonization of alkenoic acids.
DIRECT ANTI-MARKOVNIKOV ADDITION OF ACIDS TO ALKENES
申请人:The University of North Carolina at Chapel Hill
公开号:US20150133680A1
公开(公告)日:2015-05-14
A method of making an anti-Markovnikov addition product is carried out by reacting an acid with an alkene or alkyne in a dual catalyst reaction system to the exclusion of oxygen to produce said anti-Markovnikov addition product; the dual catalyst reaction system comprising a single electron oxidation catalyst in combination with a hydrogen atom donor catalyst. Compositions useful for carrying out such methods are also described.