Chiral oxime ethers in asymmetric synthesis. Part 5.1 Asymmetric synthesis of 2-substituted 5- to 8-membered nitrogen heterocycles by oxime addition–ring-closing metathesis
作者:James C. A. Hunt、Pierre Laurent、Christopher J. Moody
DOI:10.1039/b207235c
日期:——
Addition of organometallic reagents to chiral oxime ethers 1 derived from an unsaturated aldehyde, or addition of an alkene containing organometallic to chiral aldoxime ethers 2 results in highly stereoselective formation of the hydroxylamines 6. N-Allylation gives the dienes 7 which undergo ring-closingmetathesis (RCM) reaction to give the 5-, 6-, and 7-membered nitrogen heterocycles 8. Likewise
Hydroformylation of Alkenylamines. Concise Approaches toward Piperidines, Quinolizidines, and Related Alkaloids
作者:Etienne Airiau、Nicolas Girard、Marianna Pizzeti、Jessica Salvadori、Maurizio Taddei、André Mann
DOI:10.1021/jo101776y
日期:2010.12.17
Linear hydroformylation of N-protected allyl- or homoallylamines (cyclohydrocarbonylation: CHC), followed by a reductive amination constitute the two key steps toward convenient routes to aza-heterocycles.
Highly efficient three-component synthesis of protected homoallylic amines by bismuth triflate-catalyzed allylation of aldimines
作者:Thierry Ollevier、Tuya Ba
DOI:10.1016/j.tetlet.2003.09.221
日期:2003.12
Bismuthtriflatecatalyzes the allylation of a variety of in situ generated protected aldimines using aldehydes, primary carbamates, and allyltrimethylsilane in a three-component reaction. The reaction proceeds rapidly and affords the corresponding protected homoallylic amine in good yield (up to 86%). Scope and limitations of the aldehyde and carbamate components are reported.
Vinylsulfones have been efficiently synthesized by treatment of alkenes with sodium arene sulfinates using potassium iodide and sodium periodate in the presence of a catalytic amount of acetic acid at room temperature. The products are formed in high yields (87-95%) within 2.5-8 hours. vinylsulfone - alkene - arylsulfinate - synthetic methods Part 229 in the series ‘Studies on Novel Synthetic Methodologies’
Mild and Efficient Tris(pentafluorophenyl)borane-catalyzed Sakurai Allylation of N-Benzyloxycarbonylamino p-Tolylsulfone with Allyltrimethylsilane
作者:Ponnaboina Thirupathi、Lok Nath Neupane、Keun-Hyeung Lee
DOI:10.5012/bkcs.2012.33.4.1275
日期:2012.4.20
Tris(pentafluorophenyl)borane, $B(C_6F_5)_3$, was found to be an efficient catalyst for synthesis of N-Cbzhomoallylic amines using Sakurai allylation of N-benzyloxycarbonyl-amino p-tolylsulfones with allyltrimethylsilane.