Four 8, 8'-biflavones were synthesized by the iodination of 2'-hydroxychalcones at 8-position in I-2-H2SO4-DMSO system as the key step followed by coupling under Ullmann reaction conditions.
Three 3, 3'-biflavones were synthesized by using iodination of flavones through I-2-CAN system as the key step followed by the coupling of 3-iodoflavones under the Ullmann reaction conditions.
文摘Four 8, 8'-biflavones were synthesized by the iodination of 2'-hydroxychalcones at 8-position in I-2-H2SO4-DMSO system as the key step followed by coupling under Ullmann reaction conditions.
文摘Three 3, 3'-biflavones were synthesized by using iodination of flavones through I-2-CAN system as the key step followed by the coupling of 3-iodoflavones under the Ullmann reaction conditions.
