๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

A review on usnic acid, an interesting natural compound

โœ Scribed by Moreno Cocchietto; Nicola Skert; Pier Nimis; Gianni Sava


Book ID
105802682
Publisher
Springer
Year
2002
Tongue
English
Weight
81 KB
Volume
89
Category
Article
ISSN
0028-1042

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An interesting substituent effect on the
โœ J. M. J. Vankan; A. J. H. Klunder; J. H. Noordik; B. Zwanenburg ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 221 KB

## Abstract The acid catalyzed rearrangement of 1โ€bromotetracyclo[4.3.0.0^2.5^0^3.8^]nonanโ€4โ€one 1b has been studied. With aqueous HBr, the exclusive formation of 2,7โ€dibromotricyclo[4.2.1.0^3.7^]โ€nonanโ€4โ€one **4b** was observed. This structure was established by Xโ€ray analysis. The divergency in b