Rearrangements and Fragmentations Mediated by Hypervalent Iodine Reagents
Bibliographic record
Abstract
Abstract This chapter describes the most important fragmentations and rearrangements induced by hypervalent iodine reagents reported in the literature as heavy metal substitutes. Several remarkable transformations that allow redesigning simple structures into elaborated and functionalized scaffolds are presented. In addition, new generations of famous transformations performed under milder conditions and, consequently, expanded scopes are also listed. Diol cleavage; decarboxylations; radical fragmentations; novel variants of Hofmann, Curtius, and Beckmann rearrangements; and aliphatic and aryl transpositions are discussed. These processes are triggered by stoichiometric or catalytically generated in situ iodane species. In addition, current examples of enantioselective variants are discussed. Other types of rearrangements, such as an iodonio‐Claisen, ring contractions and elongations, and oxidative phenols dearomatization and an arylative Meyer–Schuster reaction, are also listed.
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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) | 0.001 | 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 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".