Synthesis of Biarylsvia Palladium-Catalyzed [2+2+2] Cocyclization of Arynes and Diynes: Application to the Synthesis of Arylnaphthalene Lignans
作者:Yoshihiro Sato、Takayuki Tamura、Atsushi Kinbara、Miwako Mori
DOI:10.1002/adsc.200600587
日期:2007.3.5
palladium(0)-catalyzed [2+2+2] cocyclization of diynes and arynes was developed. By this [2+2+2] cocyclization, various arylnaphthalene derivatives, including a stericallyhindered 2,2′-disubstituted-1,1′-binaphthyl, can be constructed by virtue of a variety of combinations of diynes and aryne precursors. Using this [2+2+2] cocyclization as a key step, the total syntheses of natural arylnaphthalene lignans, taiwanin
We report a new flexible method for the synthesis of 2-functionalized benzo[b]furans and indoles from readily available o-(2,2-dibromovinyl)-phenol, -aniline or -acetanilide using a tandem Pd-assisted cyclization–coupling reaction.
我们报告了一种新的灵活的方法,可使用串联的Pd辅助环化-偶联反应从易于获得的邻-(2,2-二溴乙烯基)-苯酚,-苯胺或-对乙酰苯胺中合成2-官能化的苯并[ b ]呋喃和吲哚。。
Synthesis of 4-Arylcoumarins via Cu-Catalyzed Hydroarylation with Arylboronic Acids
作者:Yoshihiko Yamamoto、Naohiro Kirai
DOI:10.1021/ol802239n
日期:2008.12.18
In the presence of 2-4 mol % of CuOAc, methyl phenylpropiolates having a MOM-protected hydroxy group at the ortho position underwent hydroarylation with various arylboronic acids in MeOH at ambient temperature, resulting in the formation of 4-arylcoumarins in high yields after the acidic workup. This method was effectively used for the synthesis of biologically active natural and artificial compounds.