Bibliographic record
Abstract
[1993-03-9] C6H6BFO2 (MW 139.92) InChI = 1S/C6H6BFO2/c8-6-4-2-1-3-5(6)7(9)10/h1-4,9-10H InChIKey = QCSLIRFWJPOENV-UHFFFAOYSA-N (a reagent and substrate that is used to prepare chiral nonracemic P,N-ligands and Lewis acids, it is also commonly employed in palladium-catalyzed Suzuki coupling reactions) Physical Data: mp 101–110 °C (contains varying amounts of the anhydride). Solubility: soluble in water (sparingly) and most organic solvents. Form Supplied in: white crystalline solid. Analysis of Reagent Purity: HPLC, IR, NMR. Preparative Methods: ortho-lithiation of fluorobenzene with sec-butyllithium in tetrahydrofuran at −78 °C, treatment with trimethyl borate (−78 °C to room temperature), and subsequent hydrolysis.1 2-Fluorophenylboronic acid can also be prepared from 1-bromo-2-fluorobenzene [transmetallation with n-butyllithium at −78 °C, treatment with trimethyl borate (2 equiv, −78 °C to room temperature), and subsequent hydrolysis with 1 M hydrochloric acid] in good yield (80%) on recrystallization from boiling water.2 Purification: recrystallization from ether or water.1, 2 Handling, Storage, and Precautions: the compound should be handled with protective gloves and eyewear in a ventilated area. The compound is stable but care should be taken to avoid contact with strong oxidizing agents. Decomposition products include carbon monoxide, carbon dioxide, boron oxides, and hydrogen fluoride.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.017 | 0.010 |
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".