Total Synthesis of the Pentacyclic Diterpenoid Tropone Hainanolidol
作者:Barbara Frey、Adam P. Wells、Frances Roden、Ty Duong Au、David C. Hockless、Anthony C. Willis、Lewis N. Mander
DOI:10.1071/ch00124
日期:——
The total synthesis of the unusualditerpenoidtropone, hainanolidol (1),discovered in the bark of the yew species,Cephalotaxus hainanensis, has been completed in 26 stepsfrom 3,5-dimethylanisole. The intramolecular cyclopropanation reaction of thearyl ring in (30) by means of the rhodium mandelate-catalysed reaction of thediazoacetyl function was used to assemble the 5/7 ring system of (31), atthe