88491-44-5Relevant articles and documents
Copper-catalyzed intramolecular cross dehydrogenative coupling approach to coumestans from 2′-hydroxyl-3-arylcoumarins
Song, Xianheng,Luo, Xiang,Sheng, Jianfei,Li, Jianheng,Zhu, Zefeng,Du, Zhibo,Miao, Hui,Yan, Meng,Li, Mingkang,Zou, Yong
, p. 17391 - 17398 (2019/06/24)
A copper-catalyzed intramolecular cross dehydrogenative C-O coupling reaction of 2′-hydroxyl-3-arylcoumarins was developed. This protocol provided a facile and efficient strategy for the construction of natural coumestans and derivatives in moderate to high yields. This transformation exhibited good functional group compatibility and was amenable to substrates with free phenolic hydroxyl groups.
Synthesis of coumestrol and aureol
Sheng, Jianfei,Xu, Tianlong,Zhang, Ensheng,Zhang, Xuejing,Wei, Wentao,Zou, Yong
, p. 2749 - 2753 (2016/11/09)
A total synthesis of coumestrol (1) and aureol (2) is described. The Perkin condensation of 2-bromo-4-hydroxylphenylacetic acid (6) and o-hydroxybenzaldehydes (7) gave the corresponding 2′-bromo-3-arylcoumarins (9). A copper-catalyzed consecutive hydroxylation and aerobic oxidative coupling of 9 under microwave conditions facilitated the total synthesis of 1 and 2, respectively, with spectroscopic data highly similar to those of natural products.