Lignin Model Compounds: 4,4'-<i>O</i>-Dimethyldehydrodiacetovanillone and 4,4'-<i>O</i>-Diethyldehydrodiacetovanillone
作者:M. A. Ferreira、M. D. D. Costa、I. M. C. Mendes、M. G. Drumond、D. Piló-Veloso、N. G. Fernandes
DOI:10.1107/s0108270197018015
日期:1998.6.15
The title compounds, 5,5'-diacetyl-2,2',3,3'-tetramethoxy-1,1'-biphenyl, C20H22O6, and 5,5'-diacetyl-2,2'-diethoxy-3,3'- dimethoxy-1,1'-biphenyl (IUPAC nomenclature), C22H26O6, correspond to the 5,5'-biphenyl-type lignin model compound. They were synthesized from dehydrodiacetovanillone by alkylation with CH3I and C2H5I, In the former compound, all non-H atoms in the asymmetric unit are planar except for one C atom. In the latter compound, there are two molecules of different conformations, one of which is affected by disorder.