Sulfonato-diketimine Copper(II) Complexes: Synthesis and Application as Catalysts in Chan–Evans–Lam Couplings
Why this work is in the frame
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Bibliographic record
Abstract
Copper complexes bearing a diketimino-sulfonate ligand, LCu(NO 3 )(NCMe), were prepared and proved to be stable to water for several hours in solution. Prolonged standing in the presence of water or strong bases led to desulfonation of the ligand. LCu(NO 3 ) was inactive in the polymerization of lactide (in the presence of benzyl alcohol), but showed high activity for the Chan–Evans–Lam coupling of a variety of amines and anilines. Couplings do not require addition of base, ligand, or molecular sieves. Mechanistic investigations indicate a catalytic cycle involving dioxygen as the required oxidant, precoordination of boronic acid to the sulfonate group, and transmetalation occurring prior to reaction with the nucleophile.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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 | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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