研究了碱金属醇盐作为将CS 2加到环氧化物中的催化剂。几种市售醇盐的筛选显示叔丁醇锂是该反应的活性和选择性催化剂。研究了在最佳反应条件下不同反应参数以及底物范围的影响。末端和高度取代的环氧化物以及硫烷被转化。总共制备并分离了28种产品,收率高达95%。值得注意的是,该反应在温和的条件下进行,无需额外的溶剂。已经研究了反应的区域和立体选择性,例如,通过转化(R)-苯乙烯和(R)-环氧丙烷。此外,通过13 C NMR监测测试反应,并给出了末端和内部环氧化物转化的合理机理。该提议与观察到的反应的区域选择性和立体选择性一致。
Regio- and Stereoselective Synthesis of Dithiocarbonates under Ambient and Solvent-Free Conditions
作者:Johannes Diebler、Anke Spannenberg、Thomas Werner
DOI:10.1002/cctc.201600242
日期:2016.6.21
Herein, we report on the utilization of readily available lithium tert‐butoxide as an efficient catalyst for the addition of carbon disulfide to terminal and internal epoxides under ambient conditions. Notably, the reaction proceeds regio‐ and stereoselectively. By applying the optimized conditions, 14 terminal and internal epoxides were converted. The desired cyclic dithiocarbonates were isolated
Atom economical synthesis of di- and trithiocarbonates by the lithium tert-butoxide catalyzed addition of carbon disulfide to epoxides and thiiranes
作者:J. Diebler、A. Spannenberg、T. Werner
DOI:10.1039/c6ob01081d
日期:——
selective catalyst for this reaction. The influence of different reaction parameters as well as the substrate scope under optimized reactionconditions has been studied. Terminal and highly substituted epoxides as well as thiiranes were converted. In total 28 products were prepared and isolated in yields up to 95%. Notably, the reactions were performed undermildconditions without additional solvents
研究了碱金属醇盐作为将CS 2加到环氧化物中的催化剂。几种市售醇盐的筛选显示叔丁醇锂是该反应的活性和选择性催化剂。研究了在最佳反应条件下不同反应参数以及底物范围的影响。末端和高度取代的环氧化物以及硫烷被转化。总共制备并分离了28种产品,收率高达95%。值得注意的是,该反应在温和的条件下进行,无需额外的溶剂。已经研究了反应的区域和立体选择性,例如,通过转化(R)-苯乙烯和(R)-环氧丙烷。此外,通过13 C NMR监测测试反应,并给出了末端和内部环氧化物转化的合理机理。该提议与观察到的反应的区域选择性和立体选择性一致。