Terminal Aziridines by Addition of Grignard Reagents or Organoceriums to an (α-Chloro)sulfinylimine
作者:David Hodgson、Johannes Kloesges、Brian Evans
DOI:10.1055/s-0029-1216799
日期:2009.6
e with Grignard reagents or organoceriums gives terminal N-tert-butylsulfinyl aziridines in good yields and (mainly with organoceriums) good diastereomeric ratios. Oxidation of terminal N-tert-butylsulfinyl aziridines provides synthetically useful terminal N-Bus (Bus = tert-butylsulfonyl) aziridines. aziridines - chiral auxiliaries - imines - nucleophilic addition - organoceriums
Stereoselective synthesis of both (5S,6R)-(+)- and (5R,6S)-(−)-6-acetoxy-5-hexadecanolides, the major component of a mosquitoovipositionattractantpheromone, was achieved from (S)-2-cyclohexen-1-ol.
Direct α-C–H bondfunctionalization of unprotected cyclic amines Direct α-C–H bondfunctionalization of unprotected cyclic amines, Published online: 06 November 2017; doi:10.1038/nchem.2871NatureArticleSnippet(type=short-summary, markup= Cyclic amines bearing α-substituents are valuable building blocks for drug discovery and natural product synthesis. Introduction of α-substituents via site-selective
Organolithium additions to styrene derivatives: Intramolecular alkylation processes
作者:Xudong Wei、Richard J.K. Taylor
DOI:10.1016/0040-4039(96)00797-6
日期:1996.6
2-Benzyloxystyrene undergoes efficient carbolithiation-protonation at −78°C. At higher temperatures, however, carbolithiation is followed by intramolecularalkylation to generate the corresponding 2-alkylphenol. 2-Alloxystyrenes are shown to undergo similar reactions.
Organolithium addition to styrene and styrene derivatives: scope and limitations
作者:Xudong Wei、Paul Johnson、Richard J. K. Taylor
DOI:10.1039/a910195k
日期:——
Styrene and a range of aryl-substituted styrenederivatives are shown to undergo efficient carbolithiation–trapping reactions in diethyl ether at −78 to −25 °C. The reactivities of different types of organolithium reagents were found to be: tertiary, secondary > primary; ≫ alkenyl, methyl, phenyl. Electron donating groups (e.g. methoxy and dialkylamino) at the ortho- or para- positions of the benzene