Synthesis of novel molecular probes inspired by harringtonolide
作者:Vinayak Hegde、Marc Campitelli、Ronald J. Quinn、David Camp
DOI:10.1039/c1ob05299c
日期:——
A novel harringtonolide-inspired scaffold containing a cycloheptatriene ring and two fused cyclopentane rings has been synthesised from simple starting materials. The scaffold, containing a similar substitution pattern and relative stereochemistry to the complex diterpenoid, has been enumerated into a small library of derivatives. One of these library members has been converted into a sub-library of substituted triazoles using copper-catalysed azide-alkyne cycloaddition (click) chemistry. The scaffold may be useful in drug discovery or in the preparation of additional molecular probes for chemical biology.
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