Hypervalent Iodine Chemistry: New Oxidation Reactions Using the Iodosylbenzene−Trimethylsilyl Azide Reagent Combination. Direct α- and β-Azido Functionalization of Triisopropylsilyl Enol Ethers
作者:Philip Magnus、Jérôme Lacour、P. Andrew Evans、Michael B. Roe、Christopher Hulme
DOI:10.1021/ja953906r
日期:1996.1.1
Treatment of triisopropylsilyl (TIPS) enolethers with PhIO/TMSN3/at −18 to −15 °C rapidly (5 min) gave β-azido TIPS enolethers in high yields, with only traces of the α-azido adduct. The reaction...
Chiral Triazoles in Anion-Binding Catalysis: New Entry to Enantioselective Reissert-Type Reactions
作者:Mercedes Zurro、Sören Asmus、Julia Bamberger、Stephan Beckendorf、Olga García Mancheño
DOI:10.1002/chem.201504094
日期:2016.3.7
Easily accessible and tunable chiral triazoles have been introduced as a novel class of C−Hbond‐based H‐donors for anion‐binding organocatalysis. They have proven to be effective catalysts for the dearomatization reaction of different N‐heteroarenes. Although this dearomatization approach represents a powerful strategy to build chiral heterocycles, to date only a few catalytic methods to this end
Influence of the <i>cis</i>/<i>trans</i> configuration on the supramolecular aggregation of aryltriazoles
作者:Sara Tejera、Giada Caniglia、Rosa L Dorta、Andrea Favero、Javier González-Platas、Jesús T Vázquez
DOI:10.3762/bjoc.15.282
日期:——
substituents and the triazole units might also contribute to an overall stabilization of the supramolecular aggregation of bis(4-bromophenyl)triazoles. The trans or cis spatial disposition of the triazole rings is highly important for gelation, with the cis configuration having higher propensity.
New trialkylsilyl enol ether chemistry: direct 1,2-bis-azidonation of triisopropylsilyl enol ethers: an azido-radical addition process promoted by TEMPO
作者:Philip Magnus、Michael B. Roe、Christopher Hulme
DOI:10.1039/c39950000263
日期:——
Treatment of triisopropylsilyl enolethers with PhIO/TMSN3/TEMPO (cat.)–45 °C results in 1,2-bis-azidonation, which appears to occur through a radical addition process; the 1-azido group can be replaced by carbon nucleophiles such as allyl, methyl, cyano, acetylene and acetonyl.
An Improved Procedure for the Conversion of Alkenes and Glycals to 1,2-Diazides Using Mn(OAc)<sub>3</sub>·2H<sub>2</sub>O in Acetonitrile Containing Trifluoroacetic Acid
作者:Barry B. Snider*、Hong Lin
DOI:10.1080/00397919808007024
日期:1998.5
Abstract Alkenes and Glycals react with Mn(OAc3)·2H2O and NaN3 in 9:1 acetonitrile-trifluoroacetic acid to give 1,2-diazides in >80% yield. Allylic azides are formed by slow addition of NaN3 to a mixture of alkene, Mn(OAc)3·2H2O and Cu(OAc)2.