Bibliographic record
Abstract
(E) [86633-19-4] C22H36O2Sn (MW 451.22) InChI = 1S/C10H9O2.3C4H9.Sn/c1-2-10(11)12-8-9-6-4-3-5-7-9;3*1-3-4-2;/h1-7H,8H2;3*1,3-4H2,2H3; InChIKey = YEQOWJFTRKWTLA-UHFFFAOYSA-N (Z) [86633-18-3] InChI = 1S/C10H9O2.3C4H9.Sn/c1-2-10(11)12-8-9-6-4-3-5-7-9;3*1-3-4-2;/h1-7H,8H2;3*1,3-4H2,2H3; InChIKey = YEQOWJFTRKWTLA-UHFFFAOYSA-N (this reagent, along with the corresponding ethyl and methyl esters, are useful partners for Pd0-catalyzed coupling reactions with a variety of substrates including aryl triflates,1-3 aryl bromides4 and iodides,5, 6 vinyl triflates,7, 8 vinyl iodides,9-13 allylic chlorides,14 acyl chlorides,15-17 and sulfonyl chlorides18) Physical Data: colorless oil. Solubility: sol THF, CHCl3. Preparative Methods: the benzyl acrylates 1 and 2 can be obtained by nonstereoselective hydrostannylation of benzyl propynoate (eq 1).15, 20 Mixtures of substances 3 and 410 and of 5 and 613, 21 have been prepared in similar fashion (eq 1). In each case the geometric isomers are chromatographically separable. The stereocontrolled synthesis of 3 can be achieved by sequential treatment of (E)-1,2-bis(tributylstannyl)ethene with an alkyllithium and ClCO2Et.22, 23 On the other hand, stereospecific syntheses of 5 and 6 have been achieved by reaction of methyl (E)- and (Z)-3-chloro (or iodo)acrylates with Bu3SnCu24 (see Tri‐n‐butylstannylcopper). (1) Handling, Storage, and Precautions: since organotin compounds are toxic,19 reactions preparing and employing the reagent should be carried out and worked up in a fume hood.
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 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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.051 | 0.030 |
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".