Studies Towards a Concise Enantioselective Synthesis of Roseophilins
作者:Daniel J. Kerr、Bernard L. Flynn
DOI:10.1071/ch15407
日期:——
An oxazolidone auxiliary-controlled asymmetric Nazarov reaction has been applied to the synthesis of the cyclopentyl-fused pyrrole core of roseophilins. Additionally, a concise synthetic route to the pyrrole-furan biaryl fragment required in the synthesis of the recently isolated dechlororoseophilin is described. It is anticipated that these two syntheses can be combined in future efforts to provide
Looking for hidden symmetry: The first asymmetric totalsynthesis of pentacyclic compounds 1 and 2 has been accomplished starting from a cyclic meso‐anhydride. The absolute configuration of the final products was set by an organocatalytic desymmetrization of the meso‐anhydride. The economic synthesis is protecting‐group‐free and confirms the assigned absolute configuration.
Routiennocin is a member of a family of polycyclic pyrrole ether antibiotics that simultaneously uncouple oxidative phosphorylation and inhibit ATPase as a result of selective complexation of divalent metal ions. We describe a concise synthesis of routiennocin with the longest linear sequence of 8 steps. Our synthesis features a unique bi-directional strategy, which entails a sequential ring-opening/cross
The synthesis and antimicrobial activity of new pyrrole derivatives structurally related to monodeoxypyoluteorin are described. The insertion of a keto or methylene spacer between the phenol group and the pyrroloyl moiety of brominated 2-(2'-hydroxybenzoyl)pyrroles leads to a decrease of the antibacterial activity.