Synthesis and structure of <i>N</i>-ferrocenoyl-labeled tripeptide: <i>N</i>-Fc-<i>L</i>-Pro-<i>L</i>-Leu-Gly-OMe
Bibliographic record
Abstract
Abstract The synthesis, characterization and crystal structure of the title compound, N -ferrocenoyl- L -Pro- L -Leu-Gly-OMe (Fc-PLG), were reported in this paper. The title compound crystallized in a monoclinic system, space group C2 with Z = 4, a = 20.803(3) Å, b = 6.4428(4) Å, c = 20.557(2) Å, α = 90°, β = 115.498(5)°, γ = 90°; R = 0.0451. The Cp rings in the ferrocenoyl group are nearly coplanar, making a dihedral angle of 178.2 (4)°, while the substituted cyclopentadienyl ring and the proline ring are virtually coplanar with a very small twist angle of 14.0°. Strong hydrogen bonds between the Gly amide group N13 and the Pro carbonyl group O11 (d (N … O) = 2.835 Å) make the molecules fold into a β -turn conformation.
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How this classification was reachedexpand
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 teacher head, 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".