Reaction of β-trimethylsiloxy α-diazocarbonyl compounds with trimethylsilyl halides: a novel diazo decomposition process
作者:Fengping Xiao、Zhenhua Zhang、Jian Zhang、Jianbo Wang
DOI:10.1016/j.tetlet.2005.10.070
日期:2005.12
When β-trimethylsiloxy α-diazocarbonyl compounds were treated with trimethylsilyl halide, a mixture of α- and γ-halide substituted unsaturated carbonyl compounds was obtained. The mechanism of this novel diazo decomposition process is discussed.
Stereoselective halo-succinimide mediated γ-halogenations of substituted α-trialkylsilyl-β,γ-unsaturated esters
作者:Lisa M. Fealy、Michael P. Jennings
DOI:10.1016/j.tetlet.2019.151384
日期:2020.1
allylsilanes with halo-succinimides (NXS, X = Cl, Br, and I) has been investigated. It has been shown that these reactions readily allow for good yields and excellent diastereoselectivities (up to >20:1) for a series of α-ester allylsilanes and halo-succinimide reagents, thereby providing a straightforward approach of preparing γ-halo-(E)-α,β-unsaturated esters.
The total synthesis of a series of new carolacton derivatives that mainly lack selected methyl substituents along the polyketide backbone is reported. Their inhibitory activity towards bacterial biofilms revealed that selective removal of the methyl group at C10 does not have a major effect on biological activity, whereas additional removal of the methyl group at C14 in carolacton results in a large
Nickel-Catalyzed Asymmetric Negishi Cross-Couplings of Secondary Allylic Chlorides with Alkylzincs
作者:Sunghee Son、Gregory C. Fu
DOI:10.1021/ja800103z
日期:2008.3.1
Complementing previous advances in allylation chemistry, an effective nickel/Pybox catalyst for regioselective asymmetric Negishi cross-couplings of racemic secondary allylic chlorides with readily available organozinc halides has been developed. The method has been applied in two key steps of a formal total synthesis of fluvirucinine A(1).