Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
[497-23-4] C4H4O2 (MW 84.07) InChI = 1S/C4H4O2/c5-4-2-1-3-6-4/h1-2H,3H2 InChIKey = VIHAEDVKXSOUAT-UHFFFAOYSA-N (can be transformed into derivatives of 2-furanol including esters2 and silyl ethers;3 provides 3-(1′-hydroxyalkyl)-2(5H)-furanones by regioselective aldolization;4 undergoes highly regio- and stereoselective reactions with sulfinylallyl anions;5 serves as keystone for the convergent assembly of lignans6 and prostaglandin analogs7 through tandem vicinal difunctionalization8) Alternate Names: γ-crotonolactone; 2(5H)-furanone; but-2-en-4-olide. Physical Data: bp 86–87 °C/12 mmHg; mp 5 °C; d 1.185 g cm−3. A pKa value of 18.8 has been determined for its equilibrium acidity in DMSO (pKHA), but this may not be correct.9 Solubility: sol most organic solvents, e.g. CCl4, CH2Cl2, Et2O, toluene, THF, MeOH, and MeCN. Form Supplied in: colorless or pale yellow liquid, commercially available; expensive. Preparative Methods: obtainable by oxidation of furfural10 or by dehydrobromination of α-bromo-γ-butyrolactone10a,11 at very low cost. Handling, Storage, and Precautions: avoid contact with skin or eyes; do not inhale or ingest; vapor is irritating to the eyes and upper respiratory track. It should be stored at 4 °C or below. Use in a fume hood.
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.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.009 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.065 | 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 it