From Pyrroles to Isoindolines: Synthesis of a γ-Diimine Ligand for Applications in Palladium Coordination Chemistry and Catalysis
Bibliographic record
Abstract
The γ-diimine 1,2-(2,6- i Pr 2 -C 6 H 3 NC) 2 -C 6 H 4 ( 2 ) was synthesized by the reaction of phthalaldehyde with 2,6-diisopropylaniline. Depending on reaction conditions, 2 can cyclize to form the corresponding iminoisoindoline or isoindolinone. Unlike analogous α- and β-diimine complexes, reaction of the γ-diimine 2 with (MeCN) 2 PdCl 2 results in a dinuclear complex, [(γ-diimine)PdCl(μ-Cl)] 2 ( 5 ), where the ligand does not coordinate to the Pd(II) center in a chelating fashion but instead adopts a monodentate coordination mode. On the other hand, reaction of 2 with Pd(OAc) 2 results in C−H activation and formation of the trinuclear Pd 3 (OAc) 4 -based palladacycle {1,2-(2,6- i Pr 2 -C 6 H 3 NC) 2 -C 6 H 3 ]Pd(μ-OAc) 2 } 2 Pd ( 6 ). The resulting palladium complexes were tested as precatalysts in Heck and Suzuki coupling reactions.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.000 | 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 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".