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- W2953164497 abstract "Abstract Ultrasonic-assisted, catalyst-free reactions of ninhydrin with ethyl cyanoacetate and diethyl malonate led to the unprecedented formation of an indenopyran and a spiroindenofuran viz. diethyl 4-cyano-2-hydroxy-5-oxo-4,5-dihydroindeno[1,2-b]pyran-3,4-dicarboxylate 1 and diethyl 3a′,8b′-dihydroxy-1,3,4′-trioxo-1,3,3a′,4′-tetrahydrospiro[indene-2,2′-indeno[1,2-b]furan]-3′,3′(8b′H)-dicarboxylate 3, respectively. In addition to these unprecedented results, reactions of ninhydrin with dimedone, ethyl acetoacetate and ethyl nitroacetate yielded 4b,9b-dihydroxy-7,7-dimethyl-7,8-dihydro-4bH-indeno[1,2-b]benzofuran-9,10(6H,9bH)-dione 5, ethyl 3a,8b-dihydroxy-2-methyl-4-oxo-4,8b-dihydro-3aH-indeno[1,2-b]furan-3-carboxylate 6 and 2-hydroxy-2-(nitromethyl)-1H-indene-1,3(2H)-dione 7, respectively. The structures of 1, 3, 5, 6 and 7 were determined by X-ray crystallography and attempts have been made to propose the mechanism of their formation." @default.
- W2953164497 created "2019-06-27" @default.
- W2953164497 creator A5024878150 @default.
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- W2953164497 date "2016-04-01" @default.
- W2953164497 modified "2023-09-27" @default.
- W2953164497 title "ChemInform Abstract: Unprecedented Reaction of Ninhydrin with Ethyl Cyanoacetate and Diethyl Malonate on Ultrasonic Irradiation." @default.
- W2953164497 cites W2186109297 @default.
- W2953164497 doi "https://doi.org/10.1002/chin.201620100" @default.
- W2953164497 hasPublicationYear "2016" @default.
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