Nucleophilic Carbenes in Organic Synthesis. Construction of Functionalized Hydroindolones <i>via</i> a Novel Reaction Pathway of Dimethoxycarbene
作者:James H. Rigby、Alexandre Cavezza、Gulzar Ahmed
DOI:10.1021/ja962784f
日期:1996.1.1
Total Synthesis of (±)-Tazettine
作者:James H. Rigby、Alexandre Cavezza、Mary Jane Heeg
DOI:10.1021/ja974317j
日期:1998.4.1
The total synthesis of (±)-tazettine (1) has been achieved in 16 steps from commercially available piperonyl alcohol in 11% overall yield. The crucial quaternary center was assembled by a novel [4+1] cycloaddition between dimethoxycarbene and β-aryl vinyl isocyanate (4). Samarium diiodide conditions were employed to reduce the enamide unsaturation in the [2]benzopyrano[3,4-c]hydroindole intermediate