bearing other substituents such as a bromine atom and alkenyl, succinimide, and carbonyl groups, were prepared, and their reactions with samariumdiiodide or tributylstannane were studied. The reactions of acyl silanes occurred in various manners such as reductions, reductive alkylations, intramolecular radical cyclizations, pinacol couplings, aldol reactions, and Tishchenko reactions, depending on the nature
Intermolecular Schmidt reaction of alkyl azides with acyl silanes
作者:Chun-Jiao Yu、Rui Li、Peiming Gu
DOI:10.1016/j.tetlet.2016.06.124
日期:2016.8
The first intermolecular Schmidt reaction of alkyl azides with acyl silanes has been designed and realized, producing a range of amides with absolute site selectivity in good to excellent yields. The mechanism of the conversion has been proposed, and the reaction exhibits scope of substrates.
The reactions of bis (trimethylsilyl) peroxide with alkyl, vinyl, alkynyl, aromatic and heteroaromatic anions are described. Depending on the reaction conditions, the trimethylsilyloxy derivatives can be obtained alone or together with the corresponding trimethylsilyl derivatives, which is sometimes the major product. Enolates, generated using magnesium diisopropylamide give the corresponding hydroxycarbonyl
Highly Selective Addition of a Broad Spectrum of Trimethylsilane Pro-nucleophiles to <i>N</i>
-<i>tert</i>
-Butanesulfinyl Imines
作者:Manas Das、Donal F. O'Shea
DOI:10.1002/chem.201503354
日期:2015.12.14
Addition of organotrimethylsilane reagents to chiral N‐tert‐butanesulfinyl imines can be achieved in good yields and with excellent diastereoselectivities by employing TMSO−/Bu4N+ as a Lewis base activator in THF. A variety of aliphatic, aromatic, heteroaromatic and organometallic chiral imines were utilised as electrophiles for the synthesis of enantioenriched N‐tert‐butanesulfinyl amides. Remarkably
Catalytic Conjugate Addition of Acyl Anion Equivalents Promoted by Fluorodesilylation
作者:Scott E. Denmark、Lindsey R. Cullen
DOI:10.1021/ol403041k
日期:2014.1.3
The conjugate addition of acylanionequivalents derived from 2-silyl-1,3-dithianes to α,β-unsaturated ketones and esters has been achieved using a substoichiometric amount of TBAF. High yields and short reaction times are observed for the addition of aryl-1,3-dithianes to a variety of cyclic and acyclic α,β-unsaturated carbonyl acceptors. Observation of the reactive anion by 13C NMR spectroscopy and
已经使用亚化学计量的TBAF实现了将2-甲硅烷基-1,3-二硫杂环丁烷衍生的酰基阴离子当量共轭添加到α,β-不饱和酮和酯中。对于将芳基-1,3-二硫杂环丁烷加成到各种环状和无环α,β-不饱和羰基受体上,观察到高产率和短反应时间。还显示了通过13 C NMR光谱观察反应性阴离子并扩展至不对称变体。