The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
An Easy Entry to Optically Active Spiroindolinones: Chiral Brønsted Acid‐Catalysed Pictet–Spengler Reactions of Isatins
Abstract
The first catalytic asymmetric Pictet–Spengler reaction of isatins is presented. BINOL‐derived phosphoric acids were found to be competent catalysts for this transformation, giving challenging spirooxindole structures bearing a quaternary stereocentre with generally good results. The 1,2,3,4‐tetrahydro‐β‐carboline products (spiroindolinones) are the core of some newly discovered anti‐malarial agents.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Shangary, S., Qin, D., McEachern, D., Liu, M., Miller, R. S., Qiu, S., Nikolovska-Coleska, Z., Ding, K., Wang, G., Chen, J., et al. (2008) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0708917105 · Cited by 660
Structure-based design of potent non-peptide MDM2 inhibitors
Ding, K., Lu, Y., Nikolovska-Coleska, Z., Qiu, S., Ding, Y., Gao, W., Stuckey, J., Krajewski, K., Roller, P. P., Tomita, Y., et al. (2005) · Journal of the American Chemical Society · doi:10.1021/ja051147z · Cited by 657
Cited by
Parmar, D., Sugiono, E., Raja, S., & Rueping, M. (2014) · Chemical Reviews · doi:10.1021/cr5001496 · Cited by 2,118
Isatins As Privileged Molecules in Design and Synthesis of Spiro-Fused Cyclic Frameworks
Singh, G. S., & Desta, Z. Y. (2012) · Chemical Reviews · doi:10.1021/cr300135y · Cited by 1,601
Recent Advances in Asymmetric Organocatalytic Construction of 3,3′‐Spirocyclic Oxindoles
Hong, L., & Wang, R. (2013) · Advanced Synthesis & Catalysis · doi:10.1002/adsc.201200808 · Cited by 718
Recent advances in organocatalytic methods for the synthesis of disubstituted 2- and 3-indolinones
Dalpozzo, R., Bartoli, G., & Bencivenni, G. (2012) · Chemical Society Reviews · doi:10.1039/c2cs35100e · Cited by 673
Self-citation
Metadata
- Authors
- Duce, S., Pesciaioli, F., Gramigna, L., Bernardi, L., Mazzanti, A., Ricci, A., Bartoli, G., & Bencivenni, G.
- Venue
- Advanced Synthesis & Catalysis
- Publisher
- Wiley
- Published
- 2011-04-12
- Volume
- 353
- Issue
- 6
- Pages
- 860-864
- ISSN
- 1615-4150 (ISSN-L)
- 1615-4169
- OpenAlex
- W2055375413
- Cited by
- 160
- References
- 2
- FWCI
- 11.22
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: An Easy Entry to Optically Active Spiroindolinones: Chiral Brønsted Acid‐Catalysed Pictet–Spengler Reactions of Isatins. https://app.cochat.ai/papers/10.1002/adsc.201100050
- The paper
- Duce, S., Pesciaioli, F., Gramigna, L., Bernardi, L., Mazzanti, A., Ricci, A., Bartoli, G., & Bencivenni, G. (2011). An Easy Entry to Optically Active Spiroindolinones: Chiral Brønsted Acid‐Catalysed Pictet–Spengler Reactions of Isatins. Advanced Synthesis & Catalysis. https://doi.org/10.1002/adsc.201100050
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
