Stereocontrolled Total Syntheses of Optically Active Furofuran Lignans
摘要:
Plant products (+)-sesamin, (+)-sesaminol, (+)-methylpiperitol, (+)-aschantin, and (+)-5'-hydroxymethylpiperitol were synthesized in a highly stereocontrolled manner through L-proline-catalyzed bifunctional-urea-accelerated cross-aldol reaction, followed by biomimetic construction of the furofuran lignan skeleton through a quinomethide intermediate.
作者:Ryo Ishikawa、Naoto Yoshida、Yusuke Akao、Yusuke Kawabe、Makoto Inai、Tomohiro Asakawa、Yoshitaka Hamashima、Toshiyuki Kan
DOI:10.1246/cl.140613
日期:2014.10.5
Total syntheses of (+)-sesamin (1a) and (+)-sesaminol (1b), which are major components of sesame lignans derived from Sesamum indicum, were accomplished in a highly stereocontrolled manner. Key steps include an l-proline-catalyzed cross-aldol reaction, which was accelerated with the aid of bifunctional urea 7, and the construction of a furofuran lignan skeleton through a quinomethide intermediate.
Plant products (+)-sesamin, (+)-sesaminol, (+)-methylpiperitol, (+)-aschantin, and (+)-5'-hydroxymethylpiperitol were synthesized in a highly stereocontrolled manner through L-proline-catalyzed bifunctional-urea-accelerated cross-aldol reaction, followed by biomimetic construction of the furofuran lignan skeleton through a quinomethide intermediate.