Amphoteric α-Boryl Aldehyde Linchpins in the Synthesis of Heterocycles
Bibliographic record
Abstract
Pairing of mutually reactive functional groups in the same molecule affords enabling opportunities in chemical synthesis. Kinetically amphoteric molecules exemplify this scenario and help avoid the pitfalls of protecting-group chemistry by exploiting the innate reactivity of the functional groups. In this perspective, we highlight the recent development of MIDA ( N -methyliminodiacetyl) α-boryl aldehydes as amphoteric building blocks that act as linchpins in the synthesis of heterocycles. This short review includes topics ranging from metal-catalyzed cyclization involving B–C–Pd intermediates to the intramolecular Suzuki–Miyaura cross-coupling that affords six- and seven-membered rings. The use of boryl aldehydes in other transformations, including halogenation and oxidation protocols, is also discussed.
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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) | 0.000 | 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 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".