Smooth Conversion of 3,4-Diarylcoumarins and 3,4,5-Triaryl-2(5<i>H</i>)-furanones to 2<i>H</i>-Chromene and 2,5-Dihydrofuran Derivatives with Dimethyl Sulfide-Borane Complex
作者:Parul Verma、Sangeeta Singh、D. K. Dikshit、Suprabhat Ray
DOI:10.1055/s-1988-27468
日期:——
Reaction of 3,4-diarylcoumarins (3,4-diaryl-2-oxo-2H-1-benzopyrans) and 3,4,5-triaryl- 2(5H)-furanones with dimethyl sulfide-borane complex affords the corresponding 2H-chromenes (2H-1-benzopyrans) and 2.5-dihydrofurans in high yields. 3,4-Diaryl-2(5H)-furanones afford the corresponding furans.
3,4-二芳基香豆素(3,4-二芳基-2-氧代-2H-1-苯并吡喃)和 3,4,5-三芳基-2(5H)-呋喃酮与二甲基硫醚-硼烷络合物反应,可以高产率地得到相应的 2H-铬(2H-1-苯并吡喃)和 2.5-二氢呋喃。3,4-二芳基-2(5H)-呋喃酮可生成相应的呋喃。