Mechanistic Insight into the Formal [1,3]-Migration in the Thermal Claisen Rearrangement
作者:Shili Hou、Xinyao Li、Jiaxi Xu
DOI:10.1021/jo302210t
日期:2012.12.7
computational studies reveal that the concerted C[1,3]-sigmatropicshift suffered from a higher energetic barrier to allow the rearrangement to proceed under the conditions used. However, a tandem O[1,3]-sigmatropicshift with a configuration inversion of the oxygen atom and [3,3]-sigmatropicshift (the Claisen rearrangement) is the most likely pathway for the formal [1,3] rearrangement. Furthermore, the rearrangement
Copper(II) Triflate Catalyzed Allylic Arylation of Allylic Alcohols: Direct and Selective Access to<i>C</i>-Allylanilines
作者:Ke Chen、Houguang Jeremy Chen、Jonathan Wong、Jinglei Yang、Sumod A. Pullarkat
DOI:10.1002/cctc.201300408
日期:2013.12
Copper(II) triflate was used as a simple and commercially available catalyst in the directamination of allylic alcohols with anilines to provide C‐allylanilines. A wide range of functional groups were tolerated under the reaction conditions, and the products were obtained regioselectivity without the need of an activator. A detailed mechanistic investigation was undertaken. The efficacy of this protocol
Direct Trifluoromethylthiolation of Alcohols under Mild Reaction Conditions: Conversion of ROH into RSCF<sub>3</sub>
作者:Pavlo Nikolaienko、Roman Pluta、Magnus Rueping
DOI:10.1002/chem.201402679
日期:2014.8.4
A direct process for the trifluoromethylthiolation of allylic and benzylic alcoholsundermildconditions has been developed. A wide range of free alcohols underwent nucleophilic substitution in the presence of stable CuSCF3 and BF3⋅Et2O to give the corresponding products in good to excellent yields.
A method for oxidative kinetic resolution of racemic alcohols catalyzed by chiral nitroxylradical (R,R)-1 has been developed. This method is especially effective for the kinetic resolution of tert-butyl aryl carbinols (s = up to 23).