Regioselective, Lewis Acid-Catalyzed Ring-Openings of 2,3-Aziridyl Alcohols with Azoles
Bibliographic record
Abstract
Methods for regioselective ring-opening reactions of N -sulfonyl-protected aziridyl alcohols with azole nucleophiles have been developed. Several classes of azoles, including indazole, substituted pyrazole, benzotriazole, and tetrazole, have been employed as reaction partners, giving rise to C3-selective opening and >3:1 N -selectivity. BF 3 •OEt 2 is the optimal catalyst for most substrate combinations, although examples where diphenylborinic acid (Ph 2 BOH) provides higher yields, or where the reactions proceed efficiently without a catalyst, are also described. Computational modeling of the BF 3 •OEt 2 -catalyzed reaction is consistent with the observed regiochemical outcome. The calculated ring-opening transition state appears to be stabilized by an unconventional OH···FB hydrogen-bonding interaction.
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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 | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".