Synthesis of (+)-nocardione A ? use of formal radical cyclization onto a benzene ring
作者:Derrick L. J. Clive、Stephen P. Fletcher
DOI:10.1039/b307937f
日期:——
Juglone (7) was converted into enone 13; this underwent radical cyclization to afford 15, which was aromatized to 16 and elaborated into (+)-nocardione A (1), the enantiomer of the naturally-occurring tyrosine phosphatase inhibitor (â)-nocardione A (2).
Juglone (7)被转化成烯酮13;烯酮13经过自由基环化后得到15,15芳香化后得到16,并被制成(+)-nocardione A (1),这是天然存在的酪氨酸磷酸酶抑制剂(â)-nocardione A (2)的对映体。
Formal Radical Cyclization onto Benzene Rings: A General Method and Its Use in the Synthesis of <i>e</i><i>nt</i>-Nocardione A
作者:Derrick L. J. Clive、Stephen P. Fletcher、Dazhan Liu
DOI:10.1021/jo030364k
日期:2004.5.1
An indirect method is described for effecting radical cyclization onto a benzene ring. Cross-conjugated dienones 6, which are readily prepared from phenols, undergo radical cyclization (6 → 7 → 8), and the products (8) are easily aromatized. The method has been applied to the synthesis of ent-nocardione A (21).