23028-23-1Relevant articles and documents
Multicomponent Synthesis of Iminocoumarins via Rhodium-Catalyzed C - H Bond Activation
Chen, Zhan,Jin, Shengnan,Jiang, Wenyao,Zhu, Feimin,Chen, Yuqi,Zhao, Yingwei
, p. 11006 - 11013 (2020)
We herein establish a multicomponent annulation method for the synthesis of valuable iminocoumarins using aryl thiocarbamates, internal alkynes, and sulfonamides as starting materials, which are safe and readily available. The key step is a Rh-catalyzed a
Zn(II)-Catalyzed One-Pot Synthesis of Coumarins from Ynamides and Salicylaldehydes
Yoo, Huen Ji,Youn, So Won
, p. 3422 - 3426 (2019/05/10)
A highly efficient and straightforward synthesis of diversely substituted coumarins from ynamides and salicylaldehydes in the presence of Zn(II) catalyst has been developed. The sulfonamide moiety of ynamides was successfully recycled in this process, serving as an effective traceless directing group for high regioselectivity in the bond-forming event. The advantages of this protocol are good functional group tolerance, broad substrate scope, simple and high-yielding reaction, recovery/reuse of the sulfonamides, low catalyst loading of inexpensive catalyst, and, by these merits, a more cost-effective and greener process.
Ph3P/I2-Mediated Synthesis of 3-Aryl-Substituted and 3,4-Disubstituted Coumarins
Phakhodee, Wong,Duangkamol, Chuthamat,Yamano, Dolnapa,Pattarawarapan, Mookda
, p. 825 - 830 (2017/04/06)
Ph3P/I2-Et3N-mediated one-pot two-step esterification-cyclization toward 3-aryl coumarins and 3-aryl-4-methylcoumarins is reported. The reaction of a variety of aryl acetic acids containing steric or reactive group with 2-
