The C2 Selective Nucleophilic Substitution Reactions of 2,3-Epoxy Alcohols Mediated by Trialkyl Borates: The First <i>endo</i>-Mode Epoxide-Opening Reaction through an Intramolecular Metal Chelate
作者:Minoru Sasaki、Keiji Tanino、Atsushi Hirai、Masaaki Miyashita
DOI:10.1021/ol034455f
日期:2003.5.1
[reaction: see text] Highly efficient C2 selective substitution reactions of 2,3-epoxy alcohols with nucleophiles were developed by using NaN(3)-(CH(3)O)(3)B, NaSPh-(CH(3)O)(3)B, or NaCN-(C(2)H(5)O)(3)B system. The reaction proceeds through novel endo-mode epoxide opening of an intramolecular boron chelate, which was suggested from both experimental and quantum mechanic studies.
[反应:参见文本]通过使用NaN(3)-(CH(3)O)(3)B,NaSPh-(CH(3)O)开发了2,3-环氧醇与亲核试剂的高效C2选择取代反应)(3)B或NaCN-(C(2)H(5)O)(3)B系统。该反应通过分子内硼螯合物的新型内模环氧化物开口而进行,这是从实验和量子力学研究中提出的。