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2-Alkoxy-5 -oxazolones carbodiimides

FIGURE 1.18 2-AI koxy-5(4/7)-oxazol ones as intermediates in reactions of IV-alkoxycarbo-nylamino acids.22 After removal of the symmetrical anhydride from a reaction mixture containing Boc-valine and ethyl-(3-dimethylaminopropyl)-carbodiimide hydrochloride, the filtrate contained a novel activated form of Boc-valine (20% yield) that was established to be the 2-alkoxy-5(4H)-oxazolone. Slow addition of Boc-valine to ethyl-(3-dimethylamino-propyl)-carbodiimide hydrochloride in dilute solution gave a 55% yield. Petrol = petroleum ether, bp 40-60°. [Pg.18]

NL Benoiton, FMF Chen. 2-Alkoxy-5(4/7)-oxazolones fromlV-alkoxycarbonylamino acids and their implication in carbodiimide-mediated reactions in peptide synthesis. Can J Chem 59, 384, 1981. [Pg.18]

See other pages where 2-Alkoxy-5 -oxazolones carbodiimides is mentioned: [Pg.13]    [Pg.13]    [Pg.28]    [Pg.29]    [Pg.60]    [Pg.222]    [Pg.177]    [Pg.280]   
See also in sourсe #XX -- [ Pg.177 ]



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