Isolation of hypoxoside from hypoxis rooperi and synthesis of (E)-1,5-bis(3′,4′-dimethoxyphenyl)pent-4-en-1-yne
作者:Siegfried E. Drewes、Alida J. Hall、Robin A. Learmonth、Ursula J. Upfold
DOI:10.1016/s0031-9422(00)80449-5
日期:1984.5
Abstract Isolation of the known diglucoside of (E) -1,5-bis(3′,4′-dihydroxyphenyl)pent-4-en-1-yne (hypoxoside) from Hypoxis rooperi is described. In vivo tests indicate low toxic properties. A general synthesis for the introduction of the pentenyne link between two aromatic rings is described.
cis-Stilbenes were synthesized from trans-cinnamic acids, involving ethylenic-bond bromination and a subsequent one-pot microwave-promoted stereoselective debrominative decarboxylation-Suzuki cross-coupling strategy. This sequence represents a useful way to prepare a variety of combretastatin A-4 derivatives.