One-Pot Synthesis of 5-Dichloroacetyl-6-Methyl-9-Oxo-1,5-Diazabicyclo[4.3.0]Nonane
Bibliographic record
Abstract
A 5-dichloroacetyl-6-methyl-9-oxo-1,5-diazabicyclo[4.3.0]nonane one-pot synthetic route was investigated via ring closure and acylation reactions using levulinic acid, 1,3-propanediamine and dichloroacetyl chloride as the starting materials. Yield affecting factors, such as solvents, reaction temperature, stirring time, and molar ratio of reactants, were studied under orthogonal experimental design. The optimum synthetic condition were found as follows: toluene as solvent, reaction temperature 35~40℃, stirring time 1 h and the molar ratio of levulinic acid and 1,3-propanediamine 1:1. The yield could reach to 66.3%. Moreover, the structure of the compound was characterized by IR, 1H-NMR, 13C-NMR, MS, and elemental analysis. This study shows that the proposed synthetic route is simple with mild reaction conditions, and the raw materials are cheap and easy to obtain.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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 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".