PdCl<sub>2</sub>/NaI-Catalyzed Homodimeric Coupling-Cyclization Reaction of 2,3-Allenols: An Efficient Synthesis of 4-(1‘,3‘-Dien-2‘-yl)-2,5-dihydrofuran Derivatives
作者:Youqian Deng、Yihua Yu、Shengming Ma
DOI:10.1021/jo702332m
日期:2008.1.1
A PdCl2/NaI-catalyzed homodimeric coupling-cyclization reaction of 2,3-allenols was observed to provide an efficient route to 4-(1‘,3‘-dien-2‘-yl)-2,5-dihydrofuran derivatives. By using the easily available optically active starting materials, 2,5-dihydrofurans with high enantiopurity may be prepared. A Pd(II)-catalyzed mechanism was also discussed.
观察到PdCl 2 / NaI催化的2,3-烯丙醇的同二聚偶合-环化反应提供了通往4-(1',3'-二烯-2'-基)-2,5-二氢呋喃衍生物的有效途径。通过使用容易获得的旋光起始原料,可以制备具有高对映体纯度的2,5-二氢呋喃。还讨论了Pd(II)催化的机理。