FeCl<sub>3</sub>·6H<sub>2</sub>O Catalyzed Disproportionation of Allylic Alcohols and Selective Allylic Reduction of Allylic Alcohols and Their Derivatives with Benzyl Alcohol
been found to be an efficient catalyst for the disproportionation of allylicalcohols, which provides a convenient method for selective transformation of allylicalcohols to alkenes and α,β-unsaturated ketones. Furthermore, this catalytic system is also effective for highly selective allylicreduction of allylicalcohols, allylic ethers, and allylic acetates with benzyl alcohol under neutral and convenient
FeCl3·6H2O-catalyzed selective reduction of allylic halides to alkenes with concomitant oxidation of benzylic alcohols to aldehydes
作者:HouCai Zhang、RuiTing Liu、XiGeng Zhou
DOI:10.1007/s11426-013-5042-2
日期:2014.2
Iron-catalyzed direct reduction of allylic halides with benzylic alcohol was achieved, providing a new, simple, and efficient method for conducting highly regioselective hydrodehalogenation. This method not only features a readily available reductant, an inexpensive catalyst, simple manipulation, and good tolerance of functional groups including nitriles, nitro, esters, and methoxyl groups, it also
3-diarylpropenes were synthesized in good to high yields by the palladium-catalyzedallylicarylation of allylicethers, such as a cinnamyl phenyl ether, with a variety of arylboronicacidsusing a hydrazone 1a–Pd(OAc)2 system in DMAc/H2O. Using this catalyst, eugenol was also synthesized from allyl phenyl ether with (4-hydroxy-3-methoxyphenyl)boronic acid pinacol ester.
Copper-catalyzed asymmetric allylic substitution with aryl and ethyl Grignard reagents
作者:Khalid B. Selim、Ken-ichi Yamada、Kiyoshi Tomioka
DOI:10.1039/b809140d
日期:——
Phenyl- and ethyl-magnesium bromides undergo regioselective asymmetricallylicsubstitution with high enantioselectivity under the catalysis of chiral amidophosphane-copper(I) complexes.
Copper-Free Asymmetric Allylic Alkylation with Grignard Reagents
作者:Olivier Jackowski、Alexandre Alexakis
DOI:10.1002/anie.201000577
日期:2010.4.26
Open wide and say AAA: The copper‐free asymmetric allylicalkylation reaction of Grignardreagents, catalyzed by N‐heterocyclic carbenes, is reported for allyl bromide derivatives. This reaction offers good enantioselectivity and good to excellent γ regioselectivity, particularly for the formation of quaternary chiral centers (see scheme; Mes=mesityl).
张开嘴说AAA:据报道,N-杂环卡宾催化了格氏试剂的无铜不对称烯丙基烷基化反应,是烯丙基溴衍生物的反应。该反应提供了良好的对映选择性和良好的至优异的γ区域选择性,特别是对于形成四元手性中心(参见方案; Mes =甲磺酰基)。