IBX-TfOH mediated oxidation of alcohols to aldehydes and ketones under mild reaction conditions
作者:Kamlesh Kumar、Prashant Kumar、Penny Joshi、Diwan S Rawat
DOI:10.1016/j.tetlet.2020.151749
日期:2020.4
secondary alcohols using IBX-TfOH catalytic system in 1,4-dioxane at ambient temperature. The reaction affords quantitative yields of the corresponding carbonyl compounds without the formation of over oxidized products. The present synthetic protocol is compatible with a variety of substrates having arene, heteroarene and alkene functionalities. The developed synthetic protocol can be used for higher scale
Molecular Recognition and Cocrystallization of Methylated and Halogenated Fragments of Danicalipin A by Enantiopure Alleno-Acetylenic Cage Receptors
作者:Cornelius Gropp、Stefan Fischer、Tamara Husch、Nils Trapp、Erick M. Carreira、François Diederich
DOI:10.1021/jacs.9b13217
日期:2020.3.11
Enantiopure (P)4- and (M)4-configured alleno-acetyleniccage (AAC) receptors offer a highly defined interior for the complexation and structure elucidation of small molecule fragments of the stereochemically complex chlorosulfolipid danicalipin A. Solution (NMR), solid state (X-ray), and theoretical investigations of the formed host-guest complexes provide insight into the conformational preferences
Intramolecular Chirality Transfer [2 + 2] Cycloadditions of Allenoates and Alkenes
作者:Yao Xu、Young J. Hong、Dean J. Tantillo、M. Kevin Brown
DOI:10.1021/acs.orglett.7b01420
日期:2017.7.21
Intramolecular chirality transfer [2 + 2] cycloaddition of enantiomerically enriched allenoates and alkenes is presented. The use of a chiral catalyst was found to be critical to achieve high levels of diastereoselectivity compared to use of an achiral catalyst. The method developed leads to highly substituted cyclobutanes that would be difficult to prepare by alternative methods.
Synthesis of <i>Z</i>- or <i>E</i>-Trisubstituted Allylic Alcohols and Ethers by Kinetically Controlled Cross-Metathesis with a Ru Catechothiolate Complex
作者:Chaofan Xu、Zhenxing Liu、Sebastian Torker、Xiao Shen、Dongmin Xu、Amir H. Hoveyda
DOI:10.1021/jacs.7b10010
日期:2017.11.8
kinetically controlled cross-metathesis reactions that generate Z- or E-trisubstituted alkenes are disclosed. Transformations are catalyzed by ≤6.0 mol % of a Ru catechothiolate complex and afford trisubstituted allylic alcohols and ethers in up to 81% yield and >98% stereoisomeric purity. The method has considerable scope, as olefins containing an alcohol, an aldehyde, an epoxide, a carboxylic acid, or an
Selektive Synthesen mit Organometallen IV: Gezielte Hydroxylierung von Allylstellungen
作者:G�nter Rauchschwalbe、Manfred Schlosser
DOI:10.1002/hlca.19750580413
日期:1975.4.23
Conversion of alkenes into 2-alken-1-ols of predictable constitution and configuration can be readily achieved via alkenylpotassium and boronic ester intermediates.