70982-94-4Relevant articles and documents
Rhodium(III)-catalysed decarbonylative coupling of maleic anhydrides with alkynes
Matsuda, Takanori,Suzuki, Kentaro
, p. 37138 - 37141 (2014)
A formal [5 - 1 + 2] annulation for the preparation of substituted α-pyrones is reported. The reaction involves the decarbonylative coupling of substituted maleic anhydrides with internal alkynes in the presence of a rhodium(III) catalyst and a copper(II)
Oxidative Annulation of Arenecarboxylic and Acrylic Acids with Alkynes under Ambient Conditions Catalyzed by an Electron-Deficient Rhodium(III) Complex
Kudo, Eiji,Shibata, Yu,Yamazaki, Mutsumi,Masutomi, Koji,Miyauchi, Yuta,Fukui, Miho,Sugiyama, Haruki,Uekusa, Hidehiro,Satoh, Tetsuya,Miura, Masahiro,Tanaka, Ken
supporting information, p. 14190 - 14194 (2016/09/23)
It has been established that an electron-deficient CpErhodium(III) complex catalyzes the oxidative [4+2] annulation of substituted arenecarboxylic and acrylic acids with alkynes under ambient conditions (at RT–40 °C, under air) without using excess amounts of substrates to produce the corresponding substituted isocoumarins and α-pyrones in high yields. Minor modification of reaction conditions depending on the coordination ability of alkynes realized the high efficiency.
Synthesis of functionalized α-pyrone and butenolide derivatives by rhodium-catalyzed oxidative coupling of substituted acrylic acids with alkynes and alkenes
Mochida, Satoshi,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
experimental part, p. 6295 - 6298 (2009/12/08)
(Chemical Equation Presented) The straightforward and efficient synthesis of α-pyrone and butenolide derivatives has been achieved by the rhodium-catalyzed oxidative coupling reactions of substituted acrylic acids with alkynes and alkenes, respectively. Some α-pyrones obtained exhibit solid-state fluorescence.
