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Hydroxythiazole derivatives

General Synthetic Methods for Thiazole and Thiazolium Salts [Pg.304]

Alkylethers (269), R2 = alkyl, are obtained by the action of phosphorus pentasulfide on alkyl esters of a-acylamino acids (64, 334, 711) by means of the GabriePs synthesis (Section II.4), while aryl ethers (269), = aryl, [Pg.304]

An unusual reaction has been reported by Reynaud et al. (515) in which all the atoms are in the starting molecule. [Pg.304]

Interestingly. 4-hydroxythiazoles (11) react like the 4-hydroxy-THISs with alkynes and alkenes (Scheme 12) (20). further demonstrating the usefulness of 4-hydroxythiazole derivatives for the preparation of 2-pyridones and thiophenes. [Pg.7]

TABLE 11-24 2-HYDROXYTHIAZOLE DERIVATIVES CARBONYL COMPOUNDS AND SALTS THIOCARBAMFC ACID (158a)... [Pg.259]

TABLE 11-27. 2-HYDROXYTHIAZOLE DERIVATIVES BY CYCIJZATION OFa-THlOCYANATO KETONES IN ACIDIC MEDIA... [Pg.272]

VI. THIAZOLES FROM IVITRILES AND a-MERCAPTO-KETONES OR ACIDS 2,4-DISUBSTITUTED AND 4-HYDROXYTHIAZOLE DERIVATIVES... [Pg.291]

Uses, aminothiazoles derivatives, 132-172 hydroxythiazole derivatives, 438-442 mercaptothiazole derivatives, 438-442 UV spectra, 21 of alkylaminothiazoles. 38 and amino-imino equilibrium, 19, 20 and charge transfer, 21 of iminothiazolines, 38 and PPP calculations, 21 and potentiometric measurements, 21 representative data, 22 of Schiff bases, 41 and solvent effects, 21 and substituent effects, 22 of sulfathiazoles, 20 -of sulfonamidothiazoles, 116 of A-2-thiazoline-4-one, 422 pKa determination, 423 of A-4-thiazoline-2-one, in relation with protomerism, 387 representative data, 389 of A-4-thiazoline-2-thiones, 380. 381 in relation with protomerism. 378 of thiazolylcarbamates, 97 of thiazolyl-2-oxides, 409 of thiazolyl-4-oxides, 426 of 2-thiazolylthioethers, 404 of thiazolylthioureas, 94, 96 of thiazolylureas, 93... [Pg.302]

Synthesis from nitriles and a-mercapto ketones or acids 2,4-disubstituted and 4-hydroxythiazole derivatives (Type D)... [Pg.302]

HYDROXYTHIAZOLE DERIVATIVES FROM NITRILES AND a-MERCAPTO ACIDS... [Pg.155]

Thiazolin-4-one derivative 29 in hydrazino-hydrazono tautomeric equilibrium is synthesized by cyclization of l,2-diaza-l,3-butadiene 27 with aryl thioamide 28. Subsequent hydrolytic removal of the NH-Boc-hydrazo protecting group provided 5-acetyl-4-hydroxythiazole derivative 30a, which undergoes a-bromination to give a-bromomethyl ketone 30b. This bromide is used to prepare polyfunctionalized 4,5 -bithiazol-4 -ol derivatives via the Hantzsch thiazole synthesis <04SL2681>. [Pg.199]

This technique, originated by Marchesini [39,40], in 1893 involves the condensation of a a-halocarbonyl compound with ammonium thiocarbamate to give 2-hydroxythiazole derivatives. [Pg.6]

Mercaptothiazoles. Hydroxythiazoles and their Derivatives II. 4- AND 5-SUBSHTUTED THIAZOLES... [Pg.416]

See other pages where Hydroxythiazole derivatives is mentioned: [Pg.520]    [Pg.236]    [Pg.287]    [Pg.303]    [Pg.91]    [Pg.91]    [Pg.236]    [Pg.287]    [Pg.303]    [Pg.520]    [Pg.236]    [Pg.287]    [Pg.303]    [Pg.91]    [Pg.91]    [Pg.236]    [Pg.287]    [Pg.303]    [Pg.374]    [Pg.376]    [Pg.378]    [Pg.390]    [Pg.392]    [Pg.398]    [Pg.400]    [Pg.408]    [Pg.410]    [Pg.412]    [Pg.418]    [Pg.420]    [Pg.422]    [Pg.426]    [Pg.428]    [Pg.430]    [Pg.536]    [Pg.538]    [Pg.540]    [Pg.544]    [Pg.546]    [Pg.548]    [Pg.550]    [Pg.552]    [Pg.554]   
See also in sourсe #XX -- [ Pg.438 , Pg.439 , Pg.440 , Pg.441 ]



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2-Hydroxythiazole

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