Bibliographic record
Abstract
image [3485‐84‐5] C 10 H 7 NO 2 (MW 173.05) InChI = 1S/C10H7NO2/c1‐2‐11‐9(12)7‐5‐3‐4‐6‐8(7)10(11)13/h2‐6H,1H2 InChIKey = IGDLZDCWMRPMGL‐UHFFFAOYSA‐N (reagent in cyclopropanation reaction, cycloaddition reactions, metal‐catalyzed reactions, and radical addition reactions) Alternative Name(s): 2‐vinylisoindoline‐1,3‐dione. Physical Data: mp 74–75 °C. 1 ; d 1.321 g cm −3 . 2 Form Supplied in: solid; commercially available. Preparation: the title reagent is prepared by dissolving phthalimide (0.594 g) in vinyl acetate (10 mL) and adding catalytic amounts of Na 2 PdCl 4 (11.2 mg) under argon. The mixture is then heated under reflux for 8 h. Activated charcoal (15 mg) is then added and after stirring for 10 min, diethyl ether (20 mL) is added. The solids are removed by filtration and the filtrate is concentrated under reduced pressure. The crude product is extracted with diethyl ether and the extracts are dried over MgSO 4 and concentrated under reduced pressure. The residue is purified by crystallization. 3 Purification: recrystallization from petroleum benzine to form colorless needles. 4 Handling, Storage, and Precautions: should be stored in a closed container and placed in a dry, cool, and well‐ventilated storage. This reagent is incompatible with strong oxidizing agents.
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) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.056 | 0.019 |
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".