1,5-Diaza-3,7-diphosphacyclooctanes (P2N2): An Underappreciated Ligand Class for Nickel- and Palladium-Catalyzed Heck-Type Cross-Couplings
Bibliographic record
Abstract
Abstract 1,5-Diaza-3,7-diphosphacyclooctane (P2N2) scaffolds represent a readily accessible, tunable ligand class for transition metals. However, despite their prevalence in areas such as electrocatalysis and coordination chemistry, P2N2 ligands have been rarely used to make catalysts for organic synthesis. Research into Mizoroki–Heck-type aldehyde, alcohol, and alkene arylation reactions has revealed that the P2N2 family outperforms many commonly used phosphines. This Synpacts article summarizes our work and provides a broad overview on the preparation and application of P2N2 ligands in organic synthesis. It also serves to highlight how a simple, modular class of ligands can solve contemporary challenges with transition-metal catalysis, including novel reactivity and exceptional regioselectivity.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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".