Total syntheses of three natural products, vignafuran, 2-(4-hydroxy-2-methoxyphenyl)-6-methoxybenzofuran-3-carboxylic acid methyl ester, and coumestrol from a common starting material
作者:Kou Hiroya、Naoyuki Suzuki、Akito Yasuhara、Yuya Egawa、Atsushi Kasano、Takao Sakamoto
DOI:10.1039/b006623k
日期:——
Vignafuran 2, 2-(4-hydroxy-2-methoxyphenyl)-6-methoxybenzofuran-3-carboxylic acid methyl ester 3, and coumestrol 4 were efficiently synthesized from the same starting material, 4-bromoresorcinol 14a, through the common intermediate, diarylacetylene 7. The key steps of these syntheses were the tetrabutylammonium fluoride (TBAF)-catalyzed benzo[b]furan ring formation for 2 and the carbonylative ring
Vignafuran 2,2-(4-羟基-2-甲氧基苯基)-6-甲氧基苯并呋喃-3-羧酸甲酯3,和拟雌内酯4被有效地从相同的起始材料,4-溴间苯二酚合成14a中,通过共同的中间体,diarylacetylene 7。这些合成中的关键步骤是在四丁基氟化铵(TBAF )催化苯并[ b ]呋喃环的形成为2和通过Pd复合物催化的carbonylative闭环方法3和4。