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- W4232360475 endingPage "10949" @default.
- W4232360475 startingPage "10944" @default.
- W4232360475 abstract "A novel phosphine-catalyzed [4+1] annulation of maleimides with 4,4-dicyano-2-methylenebut-3-enoates has been developed to afford spirocyclic products, and the maleimides serves as C1 synthons. Moreover, a phosphine-catalyzed formal [3+2] annulation between 4,4-dicyano-2-methylenebut-3-enoates and maleic anhydride has been also achieved, and maleic anhydride behaved as a C3 synthon in the reaction, thus efficiently affording the functionalized cyclopentenones. A stable phosphinium-containing zwitterionic compound is the key reactive intermediate in both annulations and was successfully isolated. Plausible mechanisms have been proposed on the basis of control experiments and deuterium-labeling experiments." @default.
- W4232360475 created "2022-05-12" @default.
- W4232360475 creator A5001489754 @default.
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- W4232360475 creator A5028129366 @default.
- W4232360475 creator A5035195060 @default.
- W4232360475 creator A5086152877 @default.
- W4232360475 date "2014-08-19" @default.
- W4232360475 modified "2023-10-17" @default.
- W4232360475 title "Phosphine-Catalyzed Annulations of 4,4-Dicyano-2-Methylenebut-3-enoates with Maleimides and Maleic Anhydride" @default.
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