Electric Literature of 499-40-1. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal. In a document type is Article, introducing its new discovery.
Binary Pd-polyoxometalates [Pd(dpa)2]3[PW 12O40]2¡Á12 DMSO (2), [Pd(dpa) 2]3[PMo12O40]2¡Á12 DMSO¡Á2 H2O (3), and [Pd(dpa)(DMSO)2] 2[HPMo10V2O40]¡Á4 DMSO (4) were synthesized by reaction of [Pd(dpa)(OAc)2]¡Á2 H2O (1; dpa=2,2?-dipyridylamine) with three Keggin-type polyoxometalates and fully characterized by single-crystal and powder XRD analyses, IR spectroscopy, and elemental analyses. The synthesis is facile and straightforward, and the complicated ligand-modification procedure often used in the traditional charge-transfer method can be omitted. In 2-4, Pd complexes and polyoxometalate anions are coupled through electrostatic interaction. Compound 4 is more active than the other three compounds in the selective aerobic oxidation of alcohols at ambient pressure. Interestingly, during catalytic recycling of compound 4, unprecedented ternary Pd-V-polyoxometalate [Pd(dpa)2{VO(DMSO) 5}2][PMo12O40]2¡Á4 DMSO (5), which was captured and characterized by single-crystal XRD, proved to be the true active species and showed high catalytic activity for the selective aerobic oxidation of aromatic alcohols (98.1-99.8 % conversion, 91.5-99.1 % selectivity). Moreover, on the basis of control experiments and EPR and UV/Vis spectra, a plausible reaction mechanism for the oxidation of alcohols catalyzed by 5 was proposed. Binary noble metal-POM compounds: The unprecedented ternary Pd-V-POM compound (POM=polyoxometalate) [Pd(dpa)2{VO(DMSO) 5}2][PMo12O40]2¡Á4 DMSO, which was isolated during the catalytic recycling of [Pd(dpa)(DMSO) 2]2[HPMo10V2O40]¡Á4 DMSO (dpa=2,2?-dipyridylamine) and characterized by single-crystal X-ray diffraction, proved to be the true active species and showed high catalytic activity for the aerobic oxidation of aromatic alcohols (see figure). Copyright
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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics