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A New Tropolone Synthesis via Dichloroketene

✍ Scribed by Stevens, H. C.; Reich, D. A.; Brandt, D. R.; Fountain, K. R.; Gaughan, E. J.

Book ID
120334462
Publisher
American Chemical Society
Year
1965
Tongue
English
Weight
319 KB
Volume
87
Category
Article
ISSN
0002-7863

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Pi= Swern-type oxidation of various 7-halogenobicyclo[4.l.O]heptane-2,3-or -3,4- 10 s affords the corresponding bicyclic diketones which undergo in situ ring expansion and loss of hydrogen halide to give a-tropolones in high yieme quantitative conversion of the isolable 1,4-diketone 26 into the y-tr