Synthesis, Characterization, and Assessment of Cytotoxic Properties of a Series of Titanocene Dichloride Derivatives
Bibliographic record
Abstract
A series of 15 water-soluble titanocene dichloride derivatives containing alkylammonium groups pendant to one (monocationic complexes) or both (dicationic complexes) cyclopentadienyl rings has been synthesized and characterized. The in vitro cytotoxicities of this small library of potential anticancer drugs have been assessed against human lung cancer (H209, A549, H209/CP) and ovarian cancer (A2780, A2780/CP) cell lines, and the results are compared with the cytotoxicities of both cisplatin ( cis -PtCl 2 (NH 3 ) 2 ) and a clinical formulation of titanocene dichloride that is commonly used against cisplatin-resistant tumors. While none of the compounds exhibit potency greater than that of cisplatin, several are clearly superior to the clinical formulation. In particular dicationic complexes generally exhibit greater potency than do the corresponding monocationic analogues, and derivatives containing protonated piperidinyl rings exhibit greater potency than do compounds containing protonated 2-aminoethyl or 3-aminopropyl groups. Eight of the compounds, representing a wide range of potencies, were characterized crystallographically but no correlations between effectiveness and structures were obvious.
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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) | 0.000 | 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 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".