2-(Diphenylphosphino)-2′-(<i>N</i>,<i>N</i>-dimethylamino)-biphenyl
Bibliographic record
Abstract
2-(Diphenylphosphino)-2′-(N,N-dimethylamino)-biphenyl (Ph-Davephos) [240417-00-9] C26H24NP (MW 381.4492) InChI = 1S/C26H24NP/c1-27(2)25-19-11-9-17-23(25)24-18-10-12-20-26(24)28(21-13-5-3-6-14-21)22-15-7-4-8-16-22/h3-20H,1-2H3 InChIKey = JGFXUYLYPITYGR-UHFFFAOYSA-N (phenyl version of Davephos; ligand used for various cross-coupling reactions) Physical Data: mp 124–126 °C.1 Form Supplied in: white powder. Preparation: in 2004, a synthesis of the Ph-Davephos ligand from 2-bromo-iodobenzene was reported in a four-step process with an overall yield of 43%.2 The compound can also be obtained in high yields through the reduction of the corresponding phosphine oxide using DIBAL-H.1 The original Buchwald-type biaryl ligands were prepared using a four-step process starting from 2-bromo-aniline with an overall yield of 29%.3 This synthesis was further optimized to a large scale, one-pot process via the intermediate generation of benzyne.4 Handling, Storage, and Precautions: air sensitive, keep stored under inert gas and in a dry place. Hazardous decomposition products formed under fire conditions.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.031 | 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; both teacher heads agree on what is shown here.
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".