[22]Metacyclophanedienes with Furan Bridges
Why this work is in the frame
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Bibliographic record
Abstract
2 2 ]Metacyclophanedienes with either one furan and one benzene or two furans on the bridges are thermally stable and do not convert to their isomeric dihydropyrenes, unlike the compounds with one furan or one benzene on the bridge.Huge numbers of cyclophanes have been prepared. 1However, surprisingly few have heterocycles on the bridges.In the case of [2 2 ]metacyclophanes, four are known, 1-4.Oxidation of 1 gave the pyrene, 2 while 2-4 were prepared for chirality studies. 3Five cyclophanediene derivatives are also known: we prepared the benzoand naphthoquinoxalino derivatives (5) in 1986, 4 and were somewhat surprised when they did not easily close N S N S N N S N N Ar Ar = 1 2 3 4 5to the analogous dihydropyrenes.Only later, when we prepared 5 the dibenzo derivative (6) did we understand that the heterocycle was not stopping the cyclophanediene-dihydropyrene interconversion. 6Lai was the first to prepare a [2 2 ]metacyclophanediene with a furan (7) 7 or pyrrole (8) 8 on the bridge.Interestingly, the steric 6 X 7 X = O 8 X = N-c-Hexyl X
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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 | 0.000 |
| 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 | 0.000 | 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