transfer in the Lewisacidmediated Claisen rearrangement of the allyl aryl ether for the key construction of a tertiary stereogenic center at the benzylic position followed by, for heliannuol A, ring-closing metathesis, diastereoselective epoxidation, and regioselective cleavage of the epoxide; and for heliannuol K, ring-closing metathesis and conjugate reduction of the eight-membered enone.
Highly Efficient, Enantiocontrolled Total Syntheses of (+)-Heliannuol D and (–)-Helibisabonol A
作者:Kozo Shishido、Yuki Manabe、Makoto Kanematsu、Mayu Osaka、Masahiro Yoshida
DOI:10.3987/com-13-s(s)50
日期:——
Enantiocontrolled total syntheses of (+)-heliannuol D (1) and (-)-helibisabonol A (2) have been accomplished efficiently from a common intermediate 9, derived from the optically pure aryl allyl ether 7 via a chirality transfer through a Lewis acid-mediated Claisen rearrangement and asymmetric dihydroxylation.
Inhibition of quorum sensing and biofilm formation in Vibrio harveyi by 4-fluoro-DPD; a novel potent inhibitor of AI-2 signalling
作者:Manikandan Kadirvel、Fariba Fanimarvasti、Sarah Forbes、Andrew McBain、John M. Gardiner、Gavin D. Brown、Sally Freeman
DOI:10.1039/c3cc49678c
日期:——
(±)4-Fluoro-DPD completely inhibited bioluminescence and bacterial growth of Vibrio harveyi BB170 strain by disruption of quorum sensing cascade.