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Description
TCI C0905 2-Chloro-3-ethylbenzoxazolium Tetrafluoroborate (CAS 63212-53-3) is a benzoxazolium salt used as an activating condensation reagent in organic synthesis. Its highly electrophilic C-2 position enables carboxylic acid activation, allowing amide and ester bond formation under comparatively mild conditions. The reagent is also applied to dehydration reactions and to lactone or lactam ring closure where sensitive substrates are involved. Because it is moisture sensitive, AMI Scientific recommends handling under dry or inert conditions and storing the sealed container in a cool, dry place.
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