A Computational Determination of the Origins of Diastereoselective Alkylations of a Cysteinesulfenate Anion
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Bibliographic record
Abstract
Sulfenic acid anions (RSO – ) represent an untapped functional group for the formation of sulfoxides and other organic compounds. Their stereoselective alkylation is an important component of this chemistry, but factors governing reaction outcomes are not fully understood. The current study uses Density Functional Theory methods to break down the influencing roles of substituents attached to 2‐aminoethanesulfenate. The lithium counterion can be coordinated to pendant ester or carbamate carbonyl groups, whereas the sulfenate oxygen readily participates in hydrogen bonding with proximal hydrogen atoms of the (protected) amino group. A Moc‐protected, ester substituted, 2‐aminoethanesulfenate adopts both lithium coordination and hydrogen bonding in the lowest energy form and demonstrates stereoselective methylation and benzylation consistent with experiments from the literature.
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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 | 0.000 | 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) | 0.001 | 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 it