New Options for the Reactivity of the Burgess Reagent with Epoxides in Both Racemic and Chiral Auxiliary Modes - Structural and Mechanistic Revisions, Computational Studies, and Application to Synthesis
作者:Hannes Leisch、Bradford Sullivan、Branden Fonovic、Travis Dudding、Tomas Hudlicky
DOI:10.1002/ejoc.200900159
日期:2009.6
reagent with epoxides yields diastereomeric pairs of sulfamidates, which lead to cis and trans amino alcohols in each enantiomeric series. Experimental and spectral details are provided for all new sulfamidates and the products derived from them. Structure revisions have been made for several previously reported products from the reactions of the Burgess reagent with cyclic oxiranes and styrene diols.
Burgess 试剂的手性辅助形式与环氧化物的反应产生氨基磺酸盐的非对映体对,这导致每个对映体系列中的顺式和反式氨基醇。提供了所有新磺胺酯及其衍生产品的实验和光谱细节。Burgess 试剂与环状环氧乙烷和苯乙烯二醇反应的几种先前报道的产物已经进行了结构修正。还建议对伯吉斯试剂与 1,2-二醇和环氧化物反应的可能机制进行相当大的修改。最后,包括对非手性形式的 Burgess 试剂与环氧乙烷相互作用的密度泛函理论 (DFT) 研究,以及对在使用 C2 对称催化剂的催化模式下进行的反应中观察到的缺乏不对称诱导的解释。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)