Convenient Synthesis of 3-Vinyl and 3-Styryl Coumarins
摘要:
A variety of 2-hydroxy aldehydes on reaction with 3-butenoic acid afford in a one-pot reaction the corresponding 3-vinylcoumarins. As expected, extension of the delocalized pi-electron system accomplished by Heck coupling reactions with aryl halides results in an increased fluorescence of the compounds whose applicability is yet to be established.
作者:Pia Königs、Olivia Neumann、Kristina Hackelöer、Olga Kataeva、Siegfried R. Waldvogel
DOI:10.1002/ejoc.200700819
日期:2008.1
A variety of 2-acyl-, 2-aroyl- and 2-formyl-substituted phenols are converted in a one-pot reaction with α,β-unsaturated carboxylic acid chlorides into the corresponding 3-alkenylcoumarins. Especially the labile 3-vinylcoumarins are readily available by the simple to perform protocol. If longer alkenyl chains are involved in position 3, small molecules with excellent organo gelating properties are