Open Access Helper

OpenAlex Citation Counts

OpenAlex Citations Logo

OpenAlex is a bibliographic catalogue of scientific papers, authors and institutions accessible in open access mode, named after the Library of Alexandria. It's citation coverage is excellent and I hope you will find utility in this listing of citing articles!

If you click the article title, you'll navigate to the article, as listed in CrossRef. If you click the Open Access links, you'll navigate to the "best Open Access location". Clicking the citation count will open this listing for that article. Lastly at the bottom of the page, you'll find basic pagination options.

Requested Article:

Quinine-Based Trifunctional Organocatalyst for Tandem Aza-Henry Reaction-Cyclization: Asymmetric Synthesis of Spiroxindole-Pyrrolidine/Piperidines
Saumen Hajra, Bibekananda Jana
Organic Letters (2017) Vol. 19, Iss. 18, pp. 4778-4781
Closed Access | Times Cited: 36

Showing 1-25 of 36 citing articles:

Stereoselective synthesis and applications of spirocyclic oxindoles
Alexander J. Boddy, James A. Bull
Organic Chemistry Frontiers (2021) Vol. 8, Iss. 5, pp. 1026-1084
Open Access | Times Cited: 255
Asymmetric synthesis of chiral oxindoles using isatin as starting material
Ghodsi Mohammadi Ziarani, Razieh Moradi, Negar Lashgari
Tetrahedron (2018) Vol. 74, Iss. 13, pp. 1323-1353
Closed Access | Times Cited: 65
Catalytic synthesis of 3-aminooxindoles via addition to isatin imine: an update
Jasneet Kaur, Swapandeep Singh Chimni
Organic & Biomolecular Chemistry (2018) Vol. 16, Iss. 18, pp. 3328-3347
Closed Access | Times Cited: 58
Direct Asymmetric Vinylogous Mannich Addition of 3,5-Disubstituted-4-nitroisoxazoles to Isatin-Derived Imines Catalyzed by a Bifunctional Phase-Transfer-Catalyst
Xuejian Xia, Qiongqiong Zhu, Jing Wang, et al.
The Journal of Organic Chemistry (2018) Vol. 83, Iss. 23, pp. 14617-14625
Closed Access | Times Cited: 45
Enantioselective Decarboxylative Mannich Reactions of α,β-Unsaturated β′-Ketoacids and Isatin Imines: Application in the Synthesis of Spiro[indoline-3,2′-piperidine]-2,4′-diones
Hrishikesh Devaki Sadanam Venugopal, Sunil V. Pansare
Organic Letters (2025)
Closed Access
Synthesis of 1,7‐Annulated Indazole Derivatives via Bifunctional Brønsted Base Catalyzed Cascade Reaction
Pengcheng P. Shao, Weiwu Ren
Chinese Journal of Chemistry (2025)
Closed Access
Asymmetric Organocatalytic [3 + 2]-Cycloaddition of N-Alkoxy-4-oxo-acrylamides with Isatin-Derived Ketimines: Access to Enantioselective Synthesis of Spirooxindole-imidazolidinones
Ji Won Han, Yeongju Kim, Dong-Geon Kim, et al.
Organic Letters (2025)
Closed Access
Natural product–inspired bioactive alkaloids via C–C/C–N coupling reactions: Synthetic developments, current scenario, and future perspectives
Vashundhra Sharma, Amol T. Mahajan, Gopal L. Khatik, et al.
Studies in natural products chemistry (2025), pp. 1-39
Closed Access
The Stereoselective Nitro-Mannich Reaction in the Synthesis of Active Pharmaceutical Ingredients and Other Biologically Active Compounds
Ana Maria Faísca Phillips, M. Fátima C. Guedes da Silva, Armando J. L. Pombeiro
Frontiers in Chemistry (2020) Vol. 8
Open Access | Times Cited: 30
Stereocontrolled [3+2] Cycloaddition of Donor–Acceptor Cyclopropanes to Iminooxindoles: Access to Spiro[oxindole-3,2′-pyrrolidines]
Andrey A. Akaev, Stanislav I. Bezzubov, Victor G. Desyatkin, et al.
The Journal of Organic Chemistry (2019) Vol. 84, Iss. 6, pp. 3340-3356
Closed Access | Times Cited: 27
Divergent Synthesis of Oxindolylidene Acetates and Spirooxindolopyrrolidones from Arynes
Virat G. Pandya, Santosh B. Mhaske
Organic Letters (2018) Vol. 20, Iss. 6, pp. 1483-1486
Closed Access | Times Cited: 21
Catalytic asymmetric synthesis of 3,2′-pyrrolinyl spirooxindoles via conjugate addition/Schmidt-type rearrangement of vinyl azides and (E)-alkenyloxindoles
Ziwei Zhong, Zhijie Xiao, Xiaohua Liu, et al.
Chemical Science (2020) Vol. 11, Iss. 42, pp. 11492-11497
Open Access | Times Cited: 19
Advances in the Synthesis of Benzo‐Fused Spiro Nitrogen Heterocycles: New Approaches and Modification of Old Strategies
Р. Р. Гатауллин
Helvetica Chimica Acta (2020) Vol. 103, Iss. 12
Closed Access | Times Cited: 19
Asymmetric synthesis of tetrasubstituted cyclic amines via aza-Henry reaction using cinchona alkaloid sulfonamide/zinc(ii) catalysts
Naoki Yasukawa, Ami Yamanoue, Tsunayoshi Takehara, et al.
Chemical Communications (2021) Vol. 58, Iss. 9, pp. 1318-1321
Closed Access | Times Cited: 16
Asymmetric Mannich Reaction of Isatin-Derived Ketimines with α-Fluoroindanones Catalyzed by a Chiral Phase-Transfer Catalyst
Meiyan Zhao, Zhiqi Zhao, Zhonglin Wei, et al.
The Journal of Organic Chemistry (2024) Vol. 89, Iss. 7, pp. 4474-4483
Closed Access | Times Cited: 2
Chiral Brønsted Base Activation of Donor–Acceptor Cyclopropanes toward Diastereo- and Enantioselective [3 + 2] Cycloaddition with Isatin-Derived Ketimines
Zhe‐Jia Yu, Shuang Yan, Xiao‐Li Zhao, et al.
The Journal of Organic Chemistry (2024) Vol. 89, Iss. 12, pp. 8691-8705
Closed Access | Times Cited: 2
The enantioselective addition of 1-fluoro-1-nitro(phenylsulfonyl)methane to isatin-derived ketimines
Michal Urban, Michael Franc, Martina Hofmanová, et al.
Organic & Biomolecular Chemistry (2017) Vol. 15, Iss. 43, pp. 9071-9076
Open Access | Times Cited: 20
Organocatalytic Asymmetric [4 + 2]-Cycloadditions of 2-Aminophenyl Enones with Isatin-Derived Ketimines: Diastereo- and Enantioselective Synthesis of Spirooxindole-Tetrahydroquinazolines
Ji Won Han, Yoseop Kim, Sung‐Gon Kim
Organic Letters (2023) Vol. 26, Iss. 1, pp. 252-257
Closed Access | Times Cited: 6
trans-1,2-Diaminocyclohexane-based sulfonamides as effective hydrogen-bonding organocatalysts for asymmetric Michael–hemiacetalization reaction
Maciej Dajek, Rafał Kowalczyk, Przemysław J. Boratyński
Catalysis Science & Technology (2018) Vol. 8, Iss. 17, pp. 4358-4363
Closed Access | Times Cited: 17
Organocatalytic Asymmetric Synthesis of Spirooxindole Embedded Oxazolidines
Chandrakanta Parida, Buddhadeb Mondal, Animesh Ghosh, et al.
The Journal of Organic Chemistry (2021) Vol. 86, Iss. 18, pp. 13082-13091
Closed Access | Times Cited: 14
Review on the Synthesis of Bio-Active Spiro-Fused Heterocyclic Molecules
Geetika Patel, Ashok R. Patel, Sameera Kheti, et al.
Current Organocatalysis (2023) Vol. 10, Iss. 3, pp. 180-208
Closed Access | Times Cited: 5
Synthesis of functionalized 3,2′-pyrrolidinyl spirooxindoles via domino 1,6-addition/annulation reactions of para-quinone methides and 3-chlorooxindoles
Xiaochen Tian, Yongxing Zhang, Weiwu Ren, et al.
Organic Chemistry Frontiers (2021) Vol. 9, Iss. 3, pp. 615-626
Closed Access | Times Cited: 11
One-Pot Aminoalkylation of Aldehydes: Diastereoselective Synthesis of Vicinal Diamines with Azaarylmethylamines
Haixing Guan, Xianzhong Cao, Patrick J. Walsh, et al.
Organic Letters (2019) Vol. 21, Iss. 21, pp. 8679-8683
Closed Access | Times Cited: 11
Isatin N-protected ketimines with nitromethane catalyzed by chiral binol linked monomeric macrocyclic Cu(II)–salen complex
Tusharkumar Menapara, Raj Kumar Tak, S. Saravanan, et al.
Tetrahedron (2018) Vol. 74, Iss. 49, pp. 7000-7008
Closed Access | Times Cited: 9
The one pot asymmetric synthesis of 3,3′-pyrrolidonyl spiroxindoles via a regio- and stereoselective domino reaction
Saumen Hajra, Suhas Shivajirao Bhosale, Atanu Hazra, et al.
Organic & Biomolecular Chemistry (2019) Vol. 17, Iss. 35, pp. 8140-8148
Closed Access | Times Cited: 8
Page 1 - Next Page

Scroll to top