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- W1982344491 abstract "A range of aromatic aldehydes 8a-f was tested in Knoevenagel reaction with 3-methyl-2-methylsulfanyl-3,5- dihydroimidazol-4-one 7 and piperidine as catalyst using solvent-free conditions under microwave-mediated conditions. The results of these condensations were compared to classical procedure in methylene chloride. This efficient, simple and environmentally friendly methodology gave respectively and stereoselectively the (5Z)-5-arylidene-3,5-dihydroimidazol-4-ones 9a–e in good yields (78–95%) and the precursor 9f of Leucettamine B. Then, these solvent-less condition reactions have been also applied to cyclic ketones 10a–d, acetone 12a and actived ketones 12b,c. The 1H, 13C NMR spectrum of some representative 5-ylidene-3,5-dihydroimidazol-4-ones are also reported." @default.
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- W1982344491 date "2001-01-01" @default.
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- W1982344491 title "A stereoselective route to 3-methyl-2-methylsulfanyl-5-ylidene-3,5-dihydroimidazol-4-one derivatives and precursor of Leucettamine B" @default.
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- W1982344491 doi "https://doi.org/10.1039/b101928g" @default.
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