Conservation of the Planar Chiral Information in the Tandem Oxy-Cope/Ene Reaction
Bibliographic record
Abstract
[reaction: see text] We report the stereoselective synthesis of a Decalin unit using a tandem oxy-Cope/ene reaction. [3,3]-Shift of 1,2-divinylcyclohexenol 18 generates (1E, 3Z, 7E) cyclodecatrien-2-ol 23 which tautomerizes to ketone 21 (Figure 3). The chiral information embedded in 23 is transferred into the newly formed stereogenic carbon C6 in 21. The efficiency of the chirality transfer is a reflection of the difference in the rates of ring inversion versus tautomerization of 23. Ketone 21 undergoes a carbonyl-ene reaction to give Decalin 20. Assuming a rapid equilibrium between macrocyclic diastereomers, the diastereomeric ratio of the transannular ene reaction is governed by the Curtin-Hammett principle. Analysis of the conservation of the planar chiral information in the tandem oxy-Cope/ene reaction is presented.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".