Peptides. Part XXI. Dehydrogenation of some thiazolines derived from cysteine
Abstract
Esters of 2-alkyl-Δ2-thiazoline-4-carboxylic acids are smoothly dehydrogenated by phenanthraquinone to the corresponding thiazole derivatives. Methyl 2-benzamidomethyl-Δ2-thiazoline-4-carboxylate is dehydrogenated only slowly by phenenthraquinone but rapidly by manganese dioxide. The possible application of these reactions to the detection of thiazoline rings in peptides is discussed.