Metalation of alk-1-enes, using the mixture of butyllithium and potassium tert-butoxide in tetrahydropyran, followed by stereohomogenization and ultimate treatment with chlorotrimethylsilane afforded a series of alk-2-enyltrimethylsilanes in good yield and with (Z/E) ratios ranging from 95:5 to 98:2. The deprotonation of propene can be rapidly and readily accomplished with a stoichiometric amount of the superbase suspended in pentane on a 1 mol scale.
derivatives play pivotal roles across diverse applications, yet their current synthetic methods often entail intricate functional group manipulations. Despite the widespread use of allyl silanes as carbon nucleophiles in organic synthesis, their participation in allylic C–H functionalization has been underexplored. Herein, we unveil a metal-free intermolecular C–H amination of allyl silanes facilitated
Reaction of Triorgano(Triorganogermyl)Silanes with Alkali-Metal Allyl Aicoholates
作者:Mikio Kabaki、Sumie Inoue、Yoshiro Sato
DOI:10.1080/00397919208055424
日期:1992.1
Reaction of the lithium alcoholates of 1-vinylcyclohexanol (2a), (+/-)-linalool (2b), and 1-octen-3-ol (2c) with (dimethylphenylgermyl)trimethylsilane (3a) gave selectively the corresponding allyldimethylphenylgermane derivatives (5a,c,e). Similar treatment with dimethylphenyl(trimethylgermyl)silane (3b) gave mixtures of the allyltrimethylgermanes (5b,d,f) and allyldimethylphenylsilanes (7b,d,f), whereas use of the potassium alcoholates afforded selectively 5b,d,f.
Transformation of the carboxyl group adjacent to the (η4-diene)Fe(CO)3 moiety: a convenient route to (η4-diene)Fe(CO)3 complexes containing α,β- and β,γ-unsaturated carbonyl groups, and 1,3-dicarbonyl groups
Acyl halides adjacent to an (eta(4)-diene)Fe(CO), moiety react with allylsilanes, vinylsilanes and enamines to give the corresponding allyl ketones, vinyl ketones and 1,3-diketones in high yields, respectively. The allylation reaction proceeds smoothly under neutral conditions without a Lewis acid as an activating agent, while the vinylation reaction takes place in the presence of a Lewis acid. (C) 1999 Elsevier Science S.A. All rights reserved.
Palladium-Catalyzed Oxidative Silylation of Simple Olefins To Give Allylsilanes Using Hexamethyldisilane and Molecular Oxygen as the Sole Oxidant
A Pd-catalyzed oxidative silylation of simple olefins with hexamethyldisilane to give allylsilanes has been achieved usingmolecularoxygen as the sole oxidant. The reaction provides a useful protocol to access synthetically useful allylsilanes from easily accessible simple olefins and hexamethyldisilane without using any oxidants other than O2.