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Independent Research
28. Deeksha, Dashrath Choudhary, Indra Kumar Gurjar, Abhishek P. Menon, Archana R. Deokar and Ritesh Singh*; Synthetic Approaches to Access Indolin-3-ones. Asian J. Org. Chem., 2025, 14, e202500102. DOI:10.1002/ajoc.202500102. ( Article Link)
Invited article; by Dr. Dinesh Talwar; Editor-in-Chief, Asian JOC
28. Deeksha and Ritesh Singh*; Heteroannulation of Arynes with α-Bromodifluorohydroxamates: An Efficient and General Approach to Access 2,2-Difluoro Indoxyls. Org. Lett., 2024, 26, 5682–5688 . ( Article Link)
27. Deeksha, Bittu, and Ritesh Singh*; Synthetic strategies for the construction of C3-fluorinated oxindoles. Org. Biomol. Chem., 2023, 21, 6456 - 6467. ( Article Link)
Invited article; special collection on RSC-IIT Roorkee@CFOS conference.
26. Deeksha, Elagandhula Sathish, Kiran, and Ritesh Singh*; Access to Sterically Hindered Thioethers (α-Thioamides) Under Mild Conditions Using α-Halohydroxamates: Application toward 1,4-Benzothiazinones and 4,1-Benzothiazepinones. J. Org. Chem., 2023, 88, 901–908. ( Article Link)
25. Elagandhula Sathish, Ashis Kumar Gupta, Deeksha, Sandeep Kumar Mishra, Devesh M. Sawant, and Ritesh Singh*; Heteroarylation of Congested α-Bromoamides with Imidazo-heteroarenes and Indolizines via Aza-oxyallyl Cations: Enroute to Dibenzoazepinone and Zolpidem Analogs. J. Org. Chem., 2022, 87, 14168–14176 . (Article Link)
24. Deeksha, and Ritesh Singh*; Aza-oxyallyl Cations and Their Applications in (3+m) Cycloaddition Reactions. Eur. J. Org. Chem., 2022, 2022, e202201043. (Article Link)
Selected as VIP article by the Editor
Selected for cover page
23. Yosuke Ota, Yukihiro Itoh, Takashi Kurohara, Ritesh Singh, Elghareeb E. Elboray, Chenliang Hu, Farzad Zamani, Anirban Mukherjee, Yuri Takada, Yasunobu Yamashita, Mie Morita, Mano Horinaka, Yoshihiro Sowa, Mitsuharu Masuda, Toshiyuki Sakai, and Takayoshi Suzuki*; Cancer-Cell-Selective Targeting by Arylcyclopropylamine–Vorinostat Conjugates. ACS Med. Chem. Lett. 2022, 13, 1568–1573. (Article Link)
22. Anirban Mukherjee, Ritesh Singh, Kishor D Mane and Gourab Kanti Das; Regioselectivity in Metalloradical Catalyzed C-H bond activation: A Theoretical Study. J. Organomet. Chem., 2022, 957, 122179. (Article Link)
21. Muthuraj Prakash, Yukihiro Itoh,* Yoshie Fujiwara, Yukari Takahashi,† Yuri Takada, Paolo Mellini, Elghareeb E. Elboray, Mitsuhiro Terao, Yasunobu Yamashita, Chika Yamamoto, Takao Yamaguchi, Masayuki Kotoku, Yuki Kitao, Ritesh Singh, Rohini Roy, Satoshi Obika, Makoto Oba, Dan Ohtan Wang and Takayoshi Suzuki*; Identification of Potent and Selective Inhibitors of Fat Mass Obesity-Associated Protein Using a Fragment-Merging Approach. J. Med. Chem., 2021, 64, 15810–15824. (Article Link)
20. Elagandhula Sathish, Ashis K. Gupta, Sophiya Goyal, and Ritesh Singh*; 3d-transition metal catalyzed C–H to C–N bond formation: An update. Tetrahedron, 2021, 100, 132474. (Article Link)
Invited article; Guest Editor: Dr. Debasis Banerjee
19. Anirban Mukherjee, Arshad J. Ansari, S. Rajagopal Reddy, Gourab Kanti Das, and Ritesh Singh*; Mechanistic Investigations for the Formation of Active Hexafluoroisopropyl Benzoates Involving Aza-Oxyallyl Cation and Anthranils. Asian. J. Org. Chem., 2020, 9, 2136-2143. (Article Link)
18. Arshad J. Ansari, Ayushi Yadav, Anirban Mukherjee, E. Sathish, Kommu Nagesh and Ritesh Singh*; Metal Free Amination of Congested and Functionalized Alkyl Bromide at Room Temperature. Chem. Commun., 2020, 56, 4804-4807.(Article Link)
Highlighted in Synfacts by H. Yamamoto
17. Ritesh Singh* and Anirban Mukherjee; Metalloporphyrin Catalyzed C-H Amination. ACS Catalysis, 2019, 9, 3604-3617.(Article Link)
16. A.V.G. Prasanthi, Samiyara Begum, Hemant Kumar Srivastava, Sandip Kumar Tiwari and Ritesh Singh*; Iron-Catalyzed Arene C—H Amidation using Functionalized Hydroxyl Amines at Room Temperature. ACS Catalysis, 2018, 8, 8369–8375. (Article Link)
15. Ritesh Singh,* Kommu Nagesh, Doddapaneni Yugandhar, and A.V.G. Prasanthi; Metal and Oxidant Free Modular Approach to Access N-alkoxy Oxindoles via Aryne Annulation . Org. Lett., 2018, 20, 4848–4853. (Article Link)
14. Ritesh Singh,* Kommu Nagesh, and Matam Parameshwar; Rhodium(II)-Catalyzed Undirected and Selective C(sp2)−H Amination en Route to Benzoxazolones. ACS Catalysis, 2016, 6, 6520-6524. (Article Link)
Post-doctoral & Doctoral Research
13. Simone Giovani#, Ritesh Singh# and Rudi Fasan; Efficient conversion of primary azides to aldehydes catalyzed by active site variants of myoglobin. Chemical Science, 2016, 7, 234-239. (# equal contribution) (Article Link)
12. Ritesh Singh, Joshua N Kolev, Philip A Sutera and Rudi Fasan, Enzymatic C(sp3 )–H Amination: P450-Catalyzed Conversion of Carbonazidates into Oxazolidinones. ACS Catalysis, 2015, 5, 1685–1691. (Article Link)
11. Ritesh Singh, Melanie Bordeaux and Rudi Fasan; P450-Catalyzed Intramolecular sp3 C–H Amination with Arylsulfonyl Azide Substrates. ACS Catalysis, 2014, 4, 546–552. (Article Link)
Ø Highlighted in Angew. Chem. Int. Ed. 2014, 53, 6862. (Article Link)
Ø Highlighted in Synfacts 2014, 10, 0434. (Article Link)
Ø Highlighted by Faculty1000. (Article Link)
10. Melanie Bordeaux, Ritesh Singh and Rudi Fasan; Intramolecular C(sp3)—H amination of arylsulfonyl azides with engineered and artificial myoglobin-based catalysts. Bioorganic & Medicinal Chemistry, 2014, 22, 5697-5704. (special edition honouring Tetrahedron Young Investigator award to Prof Rudi Fasan) (Article Link)
9. Ritesh Singh and Gautam Panda; Application of Nazarov type electrocyclization to access [6,5,6] and [6,5,5] core embedded new polycycles: an easy entry to tetrahydrofluorene scaffolds related to Taiwaniaquinoids and C-nor-D homosteroids. Org. Biomol. Chem. 2011, 9, 4782-4790.(Front Cover page) (Article Link)
8. Ritesh Singh and Gautam Panda; Scandium triflate-catalyzed one-pot domino approach towards general and efficient syntheses of unsymmetrical 9-substituted xanthene derivatives. Org. Biomol. Chem. 2010, 8, 1097-1105. (Article Link)
7. Ritesh Singh, Maloy Kumar Parai and Gautam Panda; Application of Nazarov cyclization to access [6-5-6] and [6-5-5]tricyclic core embedded new heterocycles: an easy entry to structures related to Taiwaniaquinoids. Org. Biomol. Chem. 2009, 7, 1858-1867. (Article Link)
6. Jyotsana Singh#, Ritesh Singh#, Preeti Gupta, Smita Rai, Asha Ganesher, Preethi Badrinarayan, G. Narahari Sastry, Rituraj Konwar and Gautam Panda; Targeting progesterone metabolism in breast cancer with L-proline derived new 14-azasteroids. Bioorganic & Medicinal Chemistry, 2017, 25, 4452-4463. (# Ist co-author) (Article Link)
5. Ritesh Singh and Gautam Panda; An Overview of Synthetic approaches for Heterocyclic steroids. Tetrahedron, 69, 2013, 2853-2884.(Article Link )
4. Ritesh Singh and Gautam Panda; L-Proline derived nitrogenous steroidal systems: an asymmetric approach to 14-azasteroids. RSC Advances, 2013, 3, 19533-19544. (Article Link)
3. Ritesh Singh, Maloy Kumar Parai, Sankalan Mondal and Gautam Panda; Contiguous generation of Quaternary and Tertiary Stereocenters: One Pot Synthesis of Chroman Fused S-proline Derived Chiral Oxazepinones. Synthetic Communications. 2013, 43, 253-259. (Article Link)
2. Sajal Kumar Das, Ritesh Singh and Gautam Panda; A New Synthetic Route to Unsymmetrical 9-Arylxanthenes. Eur. J. Org. Chem. 2009, 4757-4761. (Article Link)
1. Shagufta, Ritesh Singh, and Gautam Panda; Synthetic studies towards steroid–amino acid hybrids. Indian Journal of Chemistry 2009, 48B, 989-995. (Article Link)
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