Regioselective palladium-catalyzed tandem .alpha.-arylation/isomerization of cyclic enamides
作者:Kristina Nilsson、Anders Hallberg
DOI:10.1021/jo00295a041
日期:1990.4
Preparation of N-Formyl- and N-carbomethoxy-2,3-dihydropyrroles by palladium-catalyzed isomerization of the corresponding N-acyl-2,5-dihydropyrrole
作者:Clas Sonesson、Anders Hallberg
DOI:10.1016/0040-4039(95)00770-d
日期:1995.6
N-Formyl- and N-carbomethoxy-2,3-dihydropyrrole were prepared by palladium acetate/dppp catalyzed isomerization of N-formyl- and N-carbomethoxy-2,5-dihydropyrrole, respectively, in the presence of N,N-diisopropylethylamine and trifluoroacetic acid.
Asymmetric Heck cyclization route to indolizidine and azaazulene alkaloids: synthesis of (+)-5-epiindolizidine 167B and indolizidine 223AB
作者:Kurt Kiewel、Mathew Tallant、Gary A Sulikowski
DOI:10.1016/s0040-4039(01)01361-2
日期:2001.9
Asymmetric intramolecular Heck cyclization of endocyclic enamides occurs at room temperature to give indoloizidine and azaazulene ring systems in up to 86% enantiomeric excess. A synthesis of (+)-epiindolizidine 167B and formal synthesis of 5E,9Z-indolizidine 223AB is described. (C) 2001 Elsevier Science Ltd. All rights reserved.
EBERSON, L.;MALMBERG, M.;NYBERG, K., ACTA CHEM. SCAND., 1984, 38, N 5, 391-396
作者:EBERSON, L.、MALMBERG, M.、NYBERG, K.
DOI:——
日期:——
Substitution reactions of 2-phenylsulphonyl-piperidines and -pyrrolidines with carbon nucleophiles: Synthesis of the pyrrolidine alkaloids norruspoline and ruspolinone
作者:Dearg S. Brown、Philippe Charreau、Thomas Hansson、Steven V. Ley
DOI:10.1016/s0040-4020(01)86388-2
日期:1991.1
treatment with benzenesulphinic acid. On reaction with various carbon nucleophiles these sulphones gave good yields of substitution products. Typical nucleophiles used in these studies were organometallic reagents derived from Grignard reagents and zinc halide together with silyl enol ethers, silyl ketene acetals, allylsilanes and trimethylsilyl cyanide in the presence of a Lewis acid. These methods