A new synthesis of (Z)-coniferyl alcohol, and characterization of its derived synthetic lignin
作者:John Ralph、Yinsheng Zhang
DOI:10.1016/s0040-4020(97)10361-1
日期:1998.2
analysis of a synthetic lignin from (Z)-coniferyl a alcohol indicates that unsaturated sidechains in the resulting lignin retain their (Z)-geometry. Other structures are altered in their relative proportions but retain the same stereochemistry. Assignment of structures in these synthetic lignins provides the necessary database for more careful examination of real plant lignins.
ortho-quinone-engaged [4+2] cycloaddition. Two strategic stages were employed to prepare the highly unsaturated cycloaddition precursor 3: (1) synthesizing the diene moiety (C1–C2 and C10–C20 doublebonds) by regioselective ortho-quinone tautomerization, and (2) installing four sp2-hybridized carbon atoms (C3, C5, C6 and C7) in one step using a SeO2-promoted chemo- and regioselective oxidation reaction.
Mechanistic Study of the Biomimetic Synthesis of Flavonolignan Diastereoisomers in Milk Thistle
作者:Hanan S. Althagafy、Maria Elena Meza-Aviña、Nicholas H. Oberlies、Mitchell P. Croatt
DOI:10.1021/jo4011377
日期:2013.8.2
The mechanism for the biomimetic synthesis of flavonolignan diastereoisomers in milk thistle is proposed to proceed by single-electron oxidation of coniferyl alcohol, subsequent reaction with one of the oxygen atoms of taxifolin's catechol moiety, and finally, further oxidation to form four of the major components of silymarin: silybin A, silybin B, isosilybin A, and isosilybin B. This mechanism is significantly different from a previously proposed process that involves the coupling of two independently formed radicals.
“Solid Phase Synthesis of Cis-Coniferyl Alcohol”
作者:I. A. Rivero、S. Heredia
DOI:10.1080/00397910008087161
日期:2000.4
Synthesis of cis-coniferyl alcohol (4-hydroxy-5-methoxy- cinnamyl alcohol), using support on Wang's resin is described.