(+)-Episesaminone, a Sesamum indicum Furofuran Lignan. Isolation and Hemisynthesis
摘要:
Several lignans from Sesamum sp. contain an unusual oxygen insertion between their furano and aromatic rings. As part of our ongoing studies to clarify the biosynthetic pathway to the sesame lignans, the furanoketone, (+)-episesaminone, was isolated and fully characterized in part via hemisynthesis from (+)-sesamolin.
Oxygen insertion in <i>Sesamum</i><i>indicum</i> furanofuran lignans. Diastereoselective syntheses of enzyme substrate analogues
作者:Patrice A. Marchand、Norman G. Lewis、Jaroslav Zajicek
DOI:10.1139/v97-102
日期:1997.6.1
The furofuran lignans in sesame seed have an unusual oxygen insertion between their furan and aryl rings. In our continuing investigations on the isolation and characterization of the enzyme(s) involved, the diastereoselective syntheses of various substrate analogues for the oxygen insertion step were developed for future substrate specificity and inhibitor studies. This synthetic strategy also provided
An Efficient and Stereoselective Dearylation of Asarinin and Sesamin Tetrahydrofurofuran Lignans to Acuminatolide by Methyltrioxorhenium/H<sub>2</sub>O<sub>2</sub> and UHP Systems
作者:Raffaele Saladino、Cinzia Fiani、Claudia Crestini、Dimitris S. Argyropoulos、Stefano Marini、Massimiliano Coletta
DOI:10.1021/np060479u
日期:2007.1.1
The synthesis of stereoisomers of acuminatolide is rare and requires complex and time-consuming multistep procedures. Asarinin (1) and sesamin (2), two diasteromeric tetrahydrofurofuran lignans, are efficiently mono-dearylated by methyltrioxorhenium (MTO, I) and hydrogenperoxide (H2O2) or urea hydrogenperoxide adduct (UHP) as primary oxidant to give (-)-(7R,8'R,8R)-acuminatolide (3A) and (+)-(7S
(+)-Episesaminone, a <i>Sesamum </i><i>i</i><i>ndicum </i>Furofuran Lignan. Isolation and Hemisynthesis
作者:Patrice A. Marchand、Massuo J. Kato、Norman G. Lewis
DOI:10.1021/np9702953
日期:1997.11.1
Several lignans from Sesamum sp. contain an unusual oxygen insertion between their furano and aromatic rings. As part of our ongoing studies to clarify the biosynthetic pathway to the sesame lignans, the furanoketone, (+)-episesaminone, was isolated and fully characterized in part via hemisynthesis from (+)-sesamolin.