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Org Lett. 2015 Feb 20;17(4):972-5. doi: 10.1021/acs.orglett.5b00072. Epub 2015 Feb 5.

Recycle waste salt as reagent: a one-pot substitution/Krapcho reaction sequence to α-fluorinated esters and sulfones.

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Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University , Shanghai 200062, P. R. China.


A "one-pot" tandem substitution/Krapcho reaction is reported for the facile synthesis of α-fluorinated esters and sulfones, which utilizes the byproduct salt formed in the substitution step as an indispensible reagent to facilitate the Krapcho reaction step. This represents the first sustainable tandem reaction that internally recycles the waste salt formed in the upstream step as the reagent for the downstream step.

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