First syntheses of the biologically active fungal metabolites pestalotiopsones A, B, C and F
作者:Andrew Michael Beekman、Edwin Castillo Martinez、Russell Allan Barrow
DOI:10.1039/c2ob26904j
日期:——
utilising this chemistry. The key steps include a newly described homologation of a substituted benzoic acid to afford phenylacetate derivatives utilising Birchreductivealkylation conditions, a microwave mediated chromanone formation proceeding through an oxa-Michael cyclisation, and an IBX induced dehydrogenation to the desired chromone skeleton. The synthetic natural products were completely characterised
Syntheses of Cytosporones A, C, J, K, and N, Metabolites from Medicinal Fungi
作者:Andrew M. Beekman、Russell A. Barrow
DOI:10.1071/ch15144
日期:——
compounds for the first time. The key steps included a recently described homologation of benzoic acid to the analogous phenyl acetate using Birchreductivealkylation conditions, acylation of the appropriate phenyl acetate derivative, and a selective reduction and spontaneous biomimetic lactonization to yield the 3-isochromanone skeleton. The synthesized natural products were evaluated for their biological
Stereochemical Assignment of the Fungal Metabolites Pestalotiopsones D and E through Enantiopure Synthesis
作者:Andrew Michael Beekman、Russell Allan Barrow
DOI:10.1021/np400473u
日期:2013.11.22
of pestalotiopsones D (4) and E (5) were elucidated through total synthesis of both the R and S enantiomers, allowing for the assignment of the stereochemistry of the natural compounds as the (+)-S enantiomers. The key steps include homologation of a substituted benzoic acid to the appropriate phenylacetate derivative using Birchreductivealkylation, an oxa-Michael cyclization induced by microwave irradiation