A polymer stabilizer comprising the following alkoxy compound:
the alkoxy compound: a compound obtained by alkoxylating at least one hydroxyl group contained in a compound of the following formula (1) containing one formyl group or carbonyl group and (n−
1
) hydroxyl groups in the molecule with an alkyl group having 1 to 12 carbon atoms:
C
n
H
2n
O
n
(1)
(wherein, n represents an integer of 3 or more).
the OCH3 configurational effects of M on (M+A)+ adduct ion formation. The findings can be interpreted in terms of multisite electrostatic interaction of oxygens with the cation. Coupled with the results of gas-phase behavior by FABMS/MS(CAD), solution behavior by 1H NMR, and model calculations by MNDO, the characteristic structure of the 1 : 1adduct ion is deduced as host-guest type association between
The “classical” challenge, raised by Emil Fischer as to why one monosaccharide arylhydrazone adopts a cyclic structure but another an acyclic structure, is answered here. The present comprehensive analysis of hexose and hexosamine arylhydrazones, based on 2D NMR spectroscopy and theoretical modeling, has established that the chain of hydrogen bonds needed for conformational selection can only be completed
A SuperQuat glycolate aldol approach to the asymmetric synthesis of hexose monosaccharides
作者:Stephen G. Davies、Rebecca L. Nicholson、Andrew D. Smith
DOI:10.1039/b415943h
日期:——
A stereoselective two-carbon homologation protocol has been developed and applied to the asymmetric synthesis of the hexose monosaccharides D-galactose, D-fucose, D-idose, D-6-deoxyidose, D-talose and D-6-deoxytalose.
hexoses and 20 amino acids were investigated by electrospray ionization ion trap massspectrometry (ESI‐ITMS). The adduct ions of the amino acid and the hexose were detected for 12 amino acids but not for the other 8 amino acids which are basic acidic amino acids and amides. The ions of amino acid–hexose complexes were further investigated by tandem massspectrometry (MS/MS), and some of them just split