Synthesis and Biological Evaluation of New Dihydrobenzo[e]indole-Based Schiff Derivatives with Straight and Branched Alkyl Substituents
Bibliographic record
Abstract
Indoles constitute heterocyclic compounds that have been extensively changed by chemists to produce several variants utilized in various domains of life.This research is an ongoing endeavor that commenced earlier, focusing on the synthesis of benzoindolydene derivatives through the coupling of benzyl amine, aniline, and 4methyl-o-phenylene diamine out of the Schiff synthesis, with the objective of identifying novel potential anti-cancer medicines.The Schiff reaction occurs among aldehyde and amine groups; therefore, 1,1,2-trimethyl-1H-benzo[e]indole (W1 compound) requires functionalisation to produce two aldehyde groups through treatment with POCl3, resulting in 2-(1,1-dimethyl-1H-benzo[e]indol-2(3H)-ylidene) (W2 compound), that can execute the Schiff reaction.The examination of the three-dimensional structure reveals that the proximity of the methyl group to the aldehyde creates steric hindrance, hence prolonging the coupling process with amines from the opposite side.This characteristic enables the regulation of coupling, facilitating the synthesis of mono and di-substituted compounds by reaction of the precursor (W2 Compound) with the specified amines.Five pure chemicals have been synthesized and characterized using spectroscopic methods.The products demonstrate significant efficacy in inhibiting the HepG2 human liver cancer cells at the optimized temperature of 37℃ throughout a 24 h period, indicating their potential as cancer treatments.The IC₅₀ values for W5 were 58.4 μg/ml, and for W6 were 46.7 μg/ml.These findings indicate that compound W6 exhibits higher cytotoxic activity at lower concentrations compared to W5.In conclusion, dihydrobenzindene with both straight and branched aliphatic alkyl attachments can easily achieve a pure state and high yield utilizing (W1) as the precursor by a Schiff reaction following minimal functionalization.
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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".