One-Pot 1,1-Dihydrofluoroalkylation of Amines Using Sulfuryl Fluoride
Bibliographic record
Abstract
Sulfuryl fluoride, SO 2 F 2, has been known and used as a fumigant for over 50 years but it has only recently gained widespread interest as a reagent for organic synthesis. Herein we report a novel application of sulfuryl fluoride gas in a new 1,1-dihydrofluoroalkylation reaction, which simply involves bubbling SO 2 F 2 through a solution of amine, 1,1-dihydrofluoroalcohol, and diisopropylethylamine. The reaction is successful for a wide range of primary and secondary amines, as well as several 1,1-dihydrofluoroalcohols, to afford the 1,1-dihydrofluoroalkylated amines in 42% to 80% isolated yields. The reaction also displays excellent functional group tolerance. The ease of the one-pot activation and alkylation, combined with the wide substrate scope make this new procedure an attractive alternative to existing 1,1-dihydrofluoroalkylation methodologies.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".