Safe and Efficient Continuous-Flow Synthesis and Batchwise Hydrolysis of Ethyl 5-Acetyl-1H-pyrazole-3-carboxylate: A Key Synthon of Darolutamide
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract A safe and metal-free process using ethyl glycinate hydrochloride as the starting material has been developed for the preparation of ethyl 5-acetyl-1H-pyrazole-3-carboxylate, a key intermediate for the synthesis of potential blockbuster drug substance darolutamide. In the key step, the toxic and explosive intermediate, ethyl diazoacetate was generated and used in situ. Reaction parameters were optimized for both the batchwise and the continuous-flow variant of the synthesis. In the next step, alkaline hydrolysis of the ester led to 5-acetyl-1H-pyrazole-3-carboxylic acid, which can not only be used as a darolutamide intermediate, but it can also be considered as a valuable building block for other types of organic and medicinal chemistry transformations.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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 it