156753-07-0Relevant articles and documents
Rapid Access of Alkynyl and Alkenyl Coumarins via a Dipyridinium Methylide and Propargylamine Cascade Reaction
He, Xinwei,Li, Ruxue,Choy, Pui Ying,Liu, Tianyi,Yuen, On Ying,Leung, Man Pan,Shang, Yongjia,Kwong, Fuk Yee
, p. 7348 - 7352 (2020)
A DMAP-catalyzed cascade approach allowing facile assembly of alkynyl coumarins is reported. By virtue of reactive o-AQM (in situ generated from modular propargylamine) and a new synthetic equivalent of acyl carbene (from pyridinium ylide), the reaction proceeds smoothly to afford a variety of alkynyl coumarins in good-to-excellent yields. This transition-metal-free and oxidant-free process features moderate functional group tolerance, particularly the-Br group; thus, this protocol circumvents the inherent shortcomings of the existing Sonogashira coupling of coumarin triflates. This versatile method is also found to be applicable to the preparation of β-alkenyl coumarins, resembling the outcomes of the current Heck-type coupling reaction.
Studies in Crystal Engineering: Structure-Reactivity Correlations of substituted Styrylcoumarins and Related Systems
Moorthy, J. Narasimha,Samant, S. D.,Venkatesan, K.
, p. 1223 - 1228 (2007/10/02)
The solid state photochemical behaviour of 7-hydroxy-4-styrylcoumarin 1 and several of its derivatives and analogues has been investigated.All the compounds with the exception of 7-methoxy-4-styrylcoumarin 2 are photolabile and yield anti-HT dimers.It has
