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Facile method for the preparation of some novel bicyclic lactones

✍ Scribed by Wendel L. Nelson; Kenneth F. Nelson

Publisher: John Wiley and Sons
Year: 1969
Tongue: English
Weight: 259 KB
Volume: 58
Category: Article
ISSN: 0022-3549
DOI: 10.1002/jps.2600580727

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✦ Synopsis

The preparation of l-methyl-2,3-benzo-6-oxabicyclo[3.2.l]octane-4,7-dione and l-methyl-2,3-benzo-6-oxabicyclo[3.3.1]nonane-4,7-dione is reported by facile intramolecular cyclization of the corresponding bromotetralone. 4-Methyl-4carboxyl-1-tetralone is cyclized under the conditions of bromination. 4-Methyl-1-tetralone-4-acetic acid is cyclized only on continued heating of the a-bromoketone in acetic acid.

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