A Modular and Regioselective Synthesis of Di- and Triarylated Thiophenes: Strategies for Accessing Challenging Isomeric Motifs
Bibliographic record
Abstract
This work demonstrates a highly modular, fully regioselective, and high-yielding route to accessing a variety of multiarylated thiophene motifs. Specifically, this method was used to generate unique diarylated (2,5 or 3,5 or 4,5), triarylated (2,3,5 or 2,4,5 or 3,4,5), and tetra-arylated (2,3,4,5) thiophenes, and branched oligothiophenes. Our approach enables independent introduction of each arene, providing full control over the desired molecular structure. Given that 2,5-aryl-substituted thiophenes are highly sought-after and that aryl substitution at the 3 and 4 positions was previously highly challenging to obtain, our approach represents a facile means to generate these attractive molecules for the next generation of thiophene-based technologies.
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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 | 0.001 | 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) | 0.000 | 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".