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Pyridinium p-toluenesulfonate (PPTS) is a salt of pyridine and p-toluenesulfonic acid
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Synthesis and crystallization Crystals of the title compound were obtained by slow evaporation of a 1:1 equimolar mixture of 2-amino-6-methyl­pyridine and benzene­sulfonic acid in methanol at room temperature.

Pyridinium Chlorochromate and Pyridinium-P Toluenesulfonate with effective ..
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Pyridinium p-toluenesulfonate - Wikipedia

Masaaki Miyashita; Akira Yoshikoshi; Paul A. Grieco. Pyridinium p-toluenesulfonate. A mild and efficient catalyst for the tetrahydropyranylation of alcohols. J. Org. Chem. 1977, 42 (23), 3772-3774.Takeshi Matsukawa, Yoshihiro Mineno; Toru Odani; Shuji Okadab; Tetsuo Taniuchic;Synthesis and terahertz-wave generation of mixed crystals composed of 1-methyl-4-{2-[4-(dimethylamino)phenyl]ethenyl}pyridinium p-toluenesulfonate and p-chlorobenzenesulfonate. Journal of Crystal Growth. 2007, 299 (22), 344-348. Mild catalyst for the formation of THP derivatives of alcohols superior to p-toluenesulfonic acid, where acid-sensitive functionality is present. Similarly, the reagent has been used for deprotection of THP ethers in ethanol: J. Org. Chem., 42. 3772 (1977). This application has been extended to other acetalization or trans-acetalization reactions, where more acidic conditions are undesirable: Synthesis, 724 (1979). For use in cleavage of TBDMS protecting groups, see: J. Chem. Soc. Perkin 1, 169 (1993).

04/11/2005 · Pyridinium p-toluenesulfonate ( PPTS ) is a salt of pyridine and p-toluenesulfonic acid
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N2 - A synthetic approach to the quassinoid compound bruceantin is described. Tricyclic acid 5, prepared from 2-(methoxycarbonyl)cyclohexanone in one step by the method of Fuchs, is converted into ketal lactone 6 and thence into diol 7. The primary hydroxyl may be selectively protected to give any of several derivatives, including the tetrahydropyranyl derivative 10. Allylic oxidation of this substance provides enone 13, which is dehydrated by treatment with 4-(dimethylamino)pyridine in refluxing acetic anhydride to obtain 16. Lithium/ammonia reduction of 16 yields saturated ketone 23, which is carboxylated by the Stiles procedure to obtain the enolic β-keto ester 26. This material is dehydrogenated to 28 by a novel procedure wherein the enol is heated with thionyl chloride and collidine in refluxing carbon tetrachloride. It is proposed that the dehydrogenation occurs by sulfenylation on carbon, followed by pyrolytic elimination of the resulting sulfenyl chloride (Scheme III). The elements of the eventual tetrahydropyranone ring are introduced at this stage by reaction of 28 with silyl ketene acetal 29 at high pressure. The product, enol silane 31, is deprotected by treatment with pyridinium p-toluenesulfonate in warm ethanol to obtain 39. Bromocyclization of this material upon treatment with N-bromosuccinimide in tetrahydrofuran affords bromo ether 40, which rearranges to tetrahydrofuran 41 upon being heated at reflux in N,N-dimethylformamide solution. Deprotection of the latter material provides the β-keto ester 42, a viable intermediate for a bruceantin synthesis.

Manufacturer, Supplier And Producer of Pyridinium-P-Toluenesulfonate and other Specialty Chemical Intermediates, Omkar Speciality Chemicals Ltd, Mumbai, India
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Pyridinium p-toluenesulfonate | 24057-28-1

Takeshi Matsukawa, Yoshihiro Mineno; Toru Odani; Shuji Okadab; Tetsuo Taniuchic;Synthesis and terahertz-wave generation of mixed crystals composed of 1-methyl-4-{2-[4-(dimethylamino)phenyl]ethenyl}pyridinium p-toluenesulfonate and p-chlorobenzenesulfonate. Journal of Crystal Growth. 2007, 299 (22), 344-348.

Pyridinium p-toluenesulfonate CAS#: 24057-28-1

A proton transfer from the carboxyl group of -toluene­sulfonic acid to atom N1 and N3 of 2-amino-6-methyl pyridine resulted in the formation of a salt.