A combinatorially convenient version of synthesis of 5-substituted oxazole-4-carboxylic acid ethyl esters

…, TV Mikhalina, OY Rogozhnikova, TI Troitskaya…

Index: Tormyshev; Mikhalina; Rogozhnikova; Troitskaya; Trukhin Russian Journal of Organic Chemistry, 2006 , vol. 42, # 7 p. 1031 - 1035

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Abstract

Abstract Reaction of ethyl isocyanoacetic acid with sodium hydride in anhydrous benzene, followed by treatment with carboxylic acid chlorides or N-(acyloxy) pyrrolidine-2, 5-diones, gives 5-substituted oxazole-4-carboxylic acid esters. The procedure is applicable to derivatives of various carboxylic acids, including saturated aliphatic, α, β-unsaturated, alicyclic, aromatic, heterocyclic, and N-Boc-protected amino acids.

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