Chemoenzymatic Synthesis of (−)-Ribisins A and B from Dibenzo[<i>b,d</i>]furan
作者:Derek R. Boyd、Narain D. Sharma、Christopher J. McGivern、Paul J. Stevenson、Patrick Hoering、Christopher C. R. Allen
DOI:10.1021/acs.joc.9b02171
日期:2019.12.6
monocyclic aromatic compounds, are valuable chiral pool intermediates for the synthesis of cyclic natural products. A drawback of this approach, to the synthesis of polycyclic secondary metabolites, is that additional rings must be annulated. To date, relatively few chiral natural products have been synthesized from polycyclic arene cis-dihydrodiols. Fungal metabolites, (-)-ribisins A and B, have now been
Chemoenzymatic Total Syntheses of Ribisins A, B, and D, Polyoxygenated Benzofuran Derivatives Displaying NGF-Potentiating Properties
作者:Ping Lan、Martin G. Banwell、Anthony C. Willis
DOI:10.1021/jo500210k
日期:2014.4.4
Total syntheses of the structures, 1, 2, and 4, assigned to the biologically active natural products ribisins A, B, and D, respectively, have been achieved using the microbially derived and enantiomerically pure cis-1,2-dihydrocatechol 5 as starting material. Key steps include Suzuki-Miyaura cross-coupling, intramolecular Mitsunobu, and tandem epoxidation/rearrangement reactions. As a result of these studies, the structures of ribisins A and D have been confirmed while that of congener B was shown to be represented by 31 rather than 2.