From precursor to catalyst: the involvement of [Ru(η5-Cp∗)Cl2]2 in highly branch selective allylic etherification of cinnamyl chlorides
摘要:
(RuCp*Cl-2)(2), a general entry into Cp*Ru sandwich and half-sandwich chemistry was first used as a precatalyst in allylic etherification of cinnamyl chlorides with up to 98:2 regioselectivity (19 examples). Both the solvent effect and the exsiccant reaction condition are crucial to the reactivity and selectivity. Preliminary mechanism studies and the demonstration of Fluoxetine synthesis were presented in this work as well. (C) 2013 Elsevier Ltd. All rights reserved.
A Chiral Sulfoxide-Ligated Ruthenium Complex for Asymmetric Catalysis: Enantio- and Regioselective Allylic Substitution
作者:Barry M. Trost、Meera Rao、André P. Dieskau
DOI:10.1021/ja411310w
日期:2013.12.11
and synthesis of a novel chiral sulfoxide-ligated cyclopentadienyl ruthenium complex is described. Its utility as an asymmetric variant of [CpRu(MeCN)3]PF6 is demonstrated through its ability to function in the branched-selective asymmetric allylic alkylation of phenols and carboxylic acids. Water has also been shown to act as a competent nucleophile in this reaction to generate branched allyl alcohols