38007-20-4Relevant academic research and scientific papers
DFRC Method for Lignin Analysis. 1. New Method for β-Aryl Ether Cleavage: Lignin Model Studies
Lu, Fachuang,Ralph, John
, p. 4655 - 4660 (2007/10/03)
A new method for selective and efficient cleavage of arylglycerol-β-aryl (β-O-4) ether linkages in lignins is described and applied to several lignin β-ether models. The term "DFRC" was coined for derivatization followed by reductive cleavage. Derivatization, accompanied by cell wall solubilization, is accomplished with acetyl bromide (AcBr); reductive cleavage of resulting β-bromo ethers utilizes zinc in acetic acid. Degradation monomers, 4-acetoxycinnamyl acetates, from β-ether cleavage by the DFRC method were identified by NMR, GC-MS, and comparison of GC retention times with authentic compounds. Under the conditions used in this study, the β-ether linkage of all models was cleaved in very high (>92%) yield. The DFRC method produces simpler mixtures of monomers with higher yields than alternative hydrolytic methods. Because of its relative simplicity, mild conditions, and exceptional selectivity, this method should become a powerful analytical method for lignin characterization.
Total synthesis of (±)-porosin, a neolignan from Ocotea porosa and Urbanodendron verrucosum (Lauraceae)
Matsumoto,Takeda,Oiwamoto,Fujii,Kishida,Shibutani,Imai
, p. 2099 - 2104 (2007/10/03)
Veratraldehyde was condensed with methyl 2-chloropropanoate to give a glycidic ester. This was hydrolyzed with aqueous sodium hydroxide and the resulting sodium salt was treated with lead(IV) tetraacetate to give 1- acetoxy-1-(3,4-dimethoxyphenyl)propon-2
