The first total synthesis of (±)-1-desoxyhypnophilin
作者:David C Harrowven、Matthew C Lucas、Peter D Howes
DOI:10.1016/s0040-4020(01)00899-7
日期:2001.10
African mushroom Lentinus crinitus which displays promising antimicrobial activity. A key feature is the use of a ring closing metathesis reaction with a tertiary allylic alcohol, in conjunction with a PCC inducedoxidativerearrangement, to construct a cyclopentenone.
Structurally diverse bicyclo[3.3.0]octanes were prepared and tested for their biological activity. Both the antiproliferative activity and the results of phenotypic characterization varied with the substitution patterns. Two derivatives displayed high inhibitory (IC50 ⩽3 μM) activity against the L-929 cell line, but differed in their mode of action. A cluster analysis with impedance profiling data
Methylenecyclopentane annulation: a synthesis of the sesquiterpenoid (±)-pentalenene
作者:Edward Piers、Veranja Karunaratne
DOI:10.1039/c39840000959
日期:——
Transformation of the readily available keto acetal (10) into the novel sesquiterpenoid (±)-pentalenene (1) is accomplished via a 12-step synthetic sequence, the key conversion [(13) into (15)] of which involves a new, recently developed methylenecyclopentaneannulation process.