Synthetic Route of 499-40-1, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 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, molecular formula is C12H22O11. In a Article，once mentioned of 499-40-1
The addition of dipyridylamine to bis(3-cyano-2,4-pentanedionato)copper(II), Cu(NC-acac)2, induces changes in the mode of interaction and the conformation of the NC-acac- anion. The structure of the resulting binuclear compound was determined from a single microcrystal (monoclinic, space group P21, a = 7.894(7) A, b = 25.550(24) A, c = 11.661(13) A, beta= 106.10(8), Z = 2, R1 = 0.0564, wR2 = 0.1197). In the addition compound {[Cu(NC-acac)dipyamH](NC-acac)}2 when the NC-acac- acts as a chelating and bridging ligand, it assumes the commonly observed U(Z,Z) conformation, while behavior as weakly N-coordinated unidentate counteranion imposes the rarely encountered S(Z,E) conformation. In the [Cu(NC-acac)dipyamH](NC-acac)] entities one of the copper(II) centers is a 4 + 2 Jahn-Teller complex while the other is a square-based pyramid.
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics