DOI:
10.1055/s-00000084
Synthesis
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An inseparable mixture of 2-bromo-3,6-bis(trimethylsilyl)benzenesulfonyl fluoride and most likely 5-bromo-2-(trimethylsilyl)benzenesulfonyl fluoride (2:3) was formed in ca. 76% yield. The latter product could be formed by the bromine atom shift of the C-3 metalated monosilylated product 2e, with decrease of basicity and release of strain as driving forces. For a ‘halogen dance’ process running on a similar system, see: Mongin F, Marzi E, Schlosser M.
Eur. J. Org. Chem. 2001; 2771
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