Enantioselective Isomerization of Primary Allylic Alcohols into Chiral Aldehydes with the tol-binap/dbapen/Ruthenium(II) Catalyst
作者:Noriyoshi Arai、Keisuke Sato、Keita Azuma、Takeshi Ohkuma
DOI:10.1002/anie.201303423
日期:2013.7.15
Efficient isomerization: The title reaction was catalyzed by the [RuCl2(S)‐tol‐binap}(R)‐dbapen}]/KOH system in ethanol at 25 °C (see scheme). A series of E‐ and Z‐configured aromatic and aliphatic allylic alcohols, including a simple primary alkyl‐substituted compound (E)‐3‐methyl‐2‐hepten‐1‐ol, were transformed into the chiral aldehydes with at least 99 % ee. dbapen=2‐dibutylamino‐1‐phenylethylamine
高效异构化:在25°C的乙醇中,[RuCl 2 (S)-tol-binap} (R)-dbapen}] / KOH体系催化标题反应(参见方案)。一系列由E和Z构成的芳族和脂肪族烯丙基醇,包括简单的伯烷基取代的化合物(E)-3-甲基-2-庚烯-1-醇,均被转化为具有至少99%的手性醛 ee。dbapen = 2-二丁基氨基-1-苯乙胺,tol-binap = 2,2'-双(di-4-tolylphosphanyl)-1,1'-联萘基。