One-pot synthesis of alpha-diimines from alkylammonium salts
Bibliographic record
Abstract
A one-pot synthesis of alkyl-containing diazabutadienes from primary alkylamine HCl salts is presented. This synthesis substitutes halogenated solvents with isopropyl acetate (a recommended solvent from an environmental and hazard perspective), toluene or heptane, and avoids the need for a separate step for generating the free base amine when starting with amines in their HCl salt form. The amine HCl salts, whether commercially available or synthesized, are conveniently handled and stored. The diazabutadienes have comparable or superior purity to examples prepared with halogenated solvents, ascertained by NMR spectroscopy. Since diazabutadienes are commonly used as either ligands or precursors for heterocycles including N-heterocyclic carbenes and diazaphospholenes, this route will be of convenience to many researchers in multiple areas of catalysis.
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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 | 0.000 |
| 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) | 0.003 | 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".