Efficient Synthesis of 4-Halo-4-penten-2-ones and 3-Halo-3-butenoic Acids/Esters via Hydrohalogenation Reaction of 3,4-Pentadien-2-one and 2,3-Butadienoic Acid/Methyl Ester
作者:Shengming Ma、Zhangjie Shi、Lintao Li
DOI:10.1021/jo980129f
日期:1998.6.1
Vessiere,R.; Theron,F., Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1961, vol. 253, p. 676 - 677
作者:Vessiere,R.、Theron,F.
DOI:——
日期:——
A general method for the synthesis of reactive .alpha.,.beta.-unsaturated diazomethyl ketones: allenyl diazomethyl ketone and vinyl diazomethyl ketone
作者:N. R. Rosenquist、O. L. Chapman
DOI:10.1021/jo00882a028
日期:1976.10
Preference of β-Lactam Formation in Cu(I)-Catalyzed Intramolecular Coupling of Amides with Vinyl Bromides
作者:Qiwu Zhao、Chaozhong Li
DOI:10.1021/ol801545a
日期:2008.9.18
A general and highly efficient synthesis of 4-alkylidene-2-azetidinones was achieved by the Cu(I)-catalyzed intramolecular C-N coupling of amides with vinyl bromides. This 4-exo ring closure was found to be fundamentally preferred over other modes (5-exo, 6-exo, and 6-endo) of cyclization under copper catalysis. Tandem C-N bond formation was then successfully developed to allow the convenient generation