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- W2953266312 abstract "A Ph3P-catalyzed cyclization of α-halogeno ketones 2 with dialkyl acetylenedicarboxylates (=dialkyl but-2-ynedioates) 3 produced halogenated α,β-unsaturated γ-butyrolactone derivatives 4 in good yields (Scheme 1, Table). The presence of electron-withdrawing groups such as halogen atoms at the α-position of the ketones was necessary in this reaction. Cyclization of α-chloro ketones resulted in higher yields than that of the corresponding α-bromo ketones. Dihalogeno ketones similarly afforded the expected γ-butyrolactone derivatives in high yields." @default.
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- W2953266312 date "2012-05-01" @default.
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- W2953266312 title "Synthesis of Halogenated α,β-Unsaturated γ-Butyrolactone Derivatives by Triphenylphosphine-Catalyzed Cyclization of α-Halogeno Ketones with Dialkyl Acetylenedicarboxylates (=Dialkyl But-2-ynedioates)" @default.
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- W2953266312 doi "https://doi.org/10.1002/hlca.201100376" @default.
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