low yields from natural sources, BCA (1) and BCB (2) were prepared synthetically by employing Claisen–Schmidt condensation, and these were used as substrates for microbial transformation to obtain novel derivatives. Microbial transformation of BCA (1) and BCB (2) with the endophytic fungus Aspergillus niger KCCM 60332 yielded 10 previously undescribed chalcones (1a–1e and 2a–2e). Their structures were
Broussochalcone A (BCA, 1 ) 和 B (BCB, 2 ) 是从Broussonetia papyrifera分离的主要
生物活性成分,这是一种属于桑科的富含多
酚的植物。由于天然来源的产量低,BCA ( 1 ) 和 BCB ( 2 ) 通过采用克莱森-施密特缩合合成制备,并将它们用作微
生物转化的底物以获得新型衍
生物。BCA ( 1 ) 和 BCB ( 2 ) 与内生真菌Aspergillus niger KCCM 60332 的微
生物转化产生了 10 个以前未描述的
查耳酮 ( 1a – 1e和2a )– 2e )。它们的结构是基于光谱方法建立的。BCA ( 1 )、BCB ( 2 ) 及其代谢物(1a – 1e和2a – 2e)的细胞毒性由人类癌
细胞系 A375P、A549、HT-29、MCF-7 和 HepG2 确定,1e显示细胞毒性最强。