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- W969193527 abstract "This chapter provides an overview of the survey of laboratory methods associated with the reactions of aldehydes and ketones. α-Hydroxyacetylenes, compounds with the general structure R1C≡CC(R2)(R3)OH, are extremely important intermediates and end products in acetylenic chemistry. They are generally prepared by coupling of the acetylene R1C≡CH with the carbonyl compound R2R3C═O. Laboratory methods mostly deal with reactions of an alkali metal alkynylide or Grignard derivative with the carbonyl compound in an organic solvent or in liquid ammonia. In laboratory, the choice of a particular method is determined by the availability of the starting acetylene R1C≡CH. The most versatile method is the reaction of a lithium alkynylide with a carbonyl compound in a tetrahydrofuran-hexane mixture. In some cases, addition of lithium bromide has the favorable effect of solubilisng the lithium alkynylide resulting in improved yields. The combination of RC≡CMgX (X is usually Bromine) and tetrahydrofuran (THF) usually guarantees a good result." @default.
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- W969193527 date "2004-01-01" @default.
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- W969193527 title "Reactions with Aldehydes and Ketones" @default.
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- W969193527 doi "https://doi.org/10.1016/b978-012125751-4/50006-0" @default.
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