- Synthesis of (±)-8-deisopropyladunctin B.
Synthesis of (±)-8-deisopropyladunctin B.
Chemical & pharmaceutical bulletin (2012-01-10)
Sayo Nomura, Kenji Arimitsu, Satoshi Yamaguchi, Yuya Kosuga, Yuko Kakimoto, Takanori Komai, Kazumasa Hasegawa, Akira Nakanishi, Tamami Miyoshi, Hiroki Iwasaki, Minoru Ozeki, Ikuo Kawasaki, Ai Kurume, Shunsaku Ohta, Masayuki Yamashita
PMID22223380
ZUSAMMENFASSUNG
(±)-8-Deisopropyladunctin B, the deisopropyl form of adunctin B, which was isolated from the leaves of Piper aduncum (Piperaceae) collected in Papua New Guinea, was synthesized in 0.77% overall yield in 17 steps from 5,7-dimethoxycoumarin-3-carboxylate. The key step was our original stereoconvergent skeleton transformation from 1,2,2a,8b-tetrahydro-3H-benzo[b]cyclobuta[d]pyran-3-one to 1,2,4a,9b-tetrahydrodibenzofuran-4-ol with dimethylsulfoxonium methylide.
MATERIALIEN