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- W1976610667 abstract "Reaction of 3H-quinazoline-4-thione (1) with two mole equivalents of an alkyllithium (t-BuLi, n-BuLi or MeLi) at−78 °C in dry THF gave the corresponding 2-alkyl-1,2-dihydro-3H-quinazoline-4-thione (4, 5 or 6) in high yield. Similarly, reactions of 4-(methylthio)quinazoline (7), 4-(ethylthio)quinazoline (8) and 4-methoxyquinazoline (9) with alkyllithiums (one mole equivalent) gave the corresponding 4-substitued 2-alkyl-1,2-dihydroquinazolines 11–18. On the other hand, blocking position 2 with a phenyl group in 4-(methylthio)-2-phenylquinazoline (20) and 4-methoxy-2-phenylquinazoline (21) resulted in reaction with two mole equivalents of alkyllithiums to give 4,4-dialkyl-2-phenyl-3,4-dihydroquinazolines 22–24." @default.
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- W1976610667 date "2005-04-01" @default.
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- W1976610667 title "Addition of alkyllithiums to 3H-quinazoline-4-thione and various substituted quinazoline derivatives; application in synthesis" @default.
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- W1976610667 doi "https://doi.org/10.1080/17415990500151472" @default.
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