Ruthenium-Catalyzed C(sp <sup>2</sup> )–H Activation Using Pyridine and Imidazopyridine as Directing Groups for Selective Silylation
Bibliographic record
Abstract
Ruthenium-catalyzed C(sp 2 )–H activation using pyridine and imidazopyridine directing groups enables direct ortho-silylation of 2-arylimidazoheterocycles with hydrosilanes as silylation reagents. This method achieves regioselective C(sp 2 )–H silylation without the need for preactivation, affording ortho-silylated arylimidazo[1,2- a ]pyridines in high yields. Notably, this represents the first example of hydrosilane coupling with imidazo[1,2- a ]pyridines via pentacyclometalated intermediates. The scalable protocol is compatible with a broad range of 2-aryl nitrogen-containing heterocycles. Experimental studies support the proposed catalytic cycle, and downstream derivatization reactions highlight the synthetic utility of the products. Furthermore, long-term cycling tests of NCM811||Li cells demonstrate that the silylated product, used as an electrolyte additive, significantly improves the cathode-electrolyte interfacial stability.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".