Using the Competing Enantioselective Conversion Method to Assign the Absolute Configuration of Cyclic Amines with Bode’s Acylation Reagents
作者:Charles J. Dooley、Alexander Burtea、Christina Mitilian、Wendy T. Dao、Bo Qu、Nicholas T. Salzameda、Scott D. Rychnovsky
DOI:10.1021/acs.joc.0c01275
日期:2020.8.21
The competing enantioselective conversion (CEC) method is a quick and reliable means to determine absolute configuration. Previously, Bode’s chiral acylated hydroxamic acids were used to determine the stereochemistry of primary amines, as well as cyclic and acyclic secondary amines. The enantioselective acylation has been evaluated for 4-, 5-, and 6-membered cyclic secondary amines, including medicinally
竞争对映选择性转化(CEC)方法是确定绝对构型的快速可靠的方法。以前,Bode的手性酰化异羟肟酸用于确定伯胺以及环状和无环仲胺的立体化学。已经对4-元,5-元和6-元环状仲胺,包括与医学有关的化合物,进行了对映选择性酰化反应的评估。通过计算分析和实验结果研究了该方法的局限性。除非轴向上能顺从地获得,这是在2位带有取代基的哌啶的性能不佳,这与Bode和Kozlowski提出的过渡态几何结构是一致的。进行对照实验以研究在CEC反应条件下选择性降低的原因。本研究扩展了仲胺CEC方法的范围,并提供了对反应曲线的更好理解。