201741-04-0Relevant articles and documents
STABILIZED ACYCLIC SACCHARIDE COMPOSITE AND METHOD FOR STABILIZING ACYCLIC SACCHARIDES AND APPLICATIONS THEREOF
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, (2022/03/14)
Disclosed is a stabilized acyclic saccharide composite, which includes a LDH-based (layered double hydroxide-based) material and acyclic saccharides intercalated in interlayer regions of the LDH-based material. The acyclic saccharides stabilized and trapped in the LDH-based material give an opportunity for direct functionalization to other valuable molecules in the pharmaceutical, chemical or carbohydrate industries. Further, a novel pathway for saccharide transformation and aldol condensation without the drawbacks associated with enzymatic catalysts is achieved through the acyclic saccharides trapped by the LDH-based material.
Two-bond 13C-13C spin-coupling constants in carbohydrates: New measurements of coupling signs
Zhao, Shikai,Bondo, Gail,Zajicek, Jaroslav,Serianni, Anthony S.
, p. 145 - 152 (2007/10/03)
D-(1,3,6-13C3)Allose (1), (13C)methyl α-D-(1,2-13C2)glucopyranoside (2) and (13C)methyl β-D-(1,2-13C2)glucopyranoside (3) were synthesized and used to establish the signs of their constituent 2J(CCC) or 2J(COC) values (2J(C1,C3) in the α-pyranose of 1 (15), and 2J(C1,CH3) in 2 and 3). Compounds 2, 3 and 15 contain three mutually coupled labeled carbons, thus creating a three-spin system from which crosspeak displacements in 13C-13C COSY-45 spectra were used to determine coupling signs. In all compounds, at least one 3J(CC) value was present as an internal reference: 3J(C2,CH3 in 2 and 3, and 3J(C1,C6) and 3J(C3,C6) in 15. 2J(C1,CH3), in 2 and 3, and 2J(C1,C3) in 15, were found to be negative, thus providing experimental confirmation of the sign predictions made via the projection resultant rule described recently.
