Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 3, Pages 567-571Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201705240
Keywords
computational chemistry; fluorine; late-stage functionalization; reaction mechanisms; thiophosgene
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Funding
- JARA-HPC from RWTH Aachen University [jara0091]
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While thiophosgene finds widespread usage on a multi-ton scale, its fluorinated counterpart S=CF2 is essentially unexplored in synthesis. Using experimental reactivity tests, ReactIR and computational techniques, we herein showcase that the solid (Me4N)SCF3 functions as a safe reservoir for S=CF2. A key feature is that the reactive electrophile is not simply released over time, but instead is liberated under activation with a protic nucleophile. The reactivity of S=CF2 is mild, allowing large-scale and late-stage synthetic applications without special reaction control. The mechanism was fully elucidated, including a rationalization of the role of the Me4N cation and the origins of selectivity.
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