申请人:SOOCHOW UNIVERSITY
公开号:US20210147377A1
公开(公告)日:2021-05-20
The present invention discloses a method for preparing a cyclopenta[c]chromene compound. A cationic rare earth compound [Ln(CH)
3
CN)
9
]
3+
[(AlCl
4
)
3
]
3−
.CH
3
CN is used as a catalyst, and p-methyl thiophenol is used as an accelerator for a catalytic reaction of a chalcone compound so as to prepare a product; and Ln, contained in the catalyst, represents a positive trivalent rare earth metal ion and is selected from one of La, Nd, Sm, Gd and Yb. According to the method, the starting materials are easy to obtain, the reaction process is simple, the catalyst usage is low, the catalyst is universally applicable to various substituted 2-hydroxy chalcones, and the obtained cyclopenta[c]chromene compound has not been reported. The catalyst synthesis method is simple and easy to obtain, and the yield of the target product is high.
本发明揭示了一种制备环戊[c]色烯化合物的方法。采用阳离子稀土化合物[Ln(CH)3CN)9]3+[(AlCl4)3]3−.CH3CN作为催化剂,采用对甲基苯硫醇作为催化反应加速剂,以制备出香豆素化合物的产物;催化剂中含有的Ln代表正三价稀土金属离子,可从La、Nd、Sm、Gd和Yb中选择。该方法的起始材料易于获取,反应过程简单,催化剂用量低,催化剂普遍适用于各种取代的2-羟基香豆素,所得的环戊[c]色烯化合物尚未报道。催化剂合成方法简单易得,目标产物的收率高。