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Li K, Zhang K, Huang H, Zhang Q, Song C, Chang J. Base Promoted Intramolecular
O
‐arylation For The Synthesis of Dibenzo[
b
,
f
]oxepinones Toward Dihydroartocarpol D. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kaili Li
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 P. R. China
| | - Kun Zhang
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 P. R. China
| | - He Huang
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 P. R. China
| | - Qianqian Zhang
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 P. R. China
| | - Chuanjun Song
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 P. R. China
| | - Junbiao Chang
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 P. R. China
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2
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Samikannu R, Sethuraman S, Akula N, Radhakrishnan V, Kamisetti S, Banu S, Vetrichelvan M, Gupta A, Li J, Rampulla R, Mathur A. Solvent-specific, DAST-mediated intramolecular Friedel-Crafts reaction: access to dibenzoxepine-fused spirooxindoles. Org Biomol Chem 2021; 19:1760-1768. [PMID: 33538747 DOI: 10.1039/d0ob02461a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A facile, DAST-mediated intramolecular cyclization of 3-hydroxy-3-(2-((3-methoxybenzyl)oxy)phenyl)indolin-2-one derivatives for the synthesis of spirooxindoles fused with dibenzoxepine moieties is described. The success of this reaction is highly dependent on the choice of solvent (promoted by DCM and 1,2-DCE) and the electronic nature of the pendant aromatic ring, which is favored by the presence of electron-donating substituents. The reaction is believed to proceed through an intramolecular Friedel-Crafts-type reaction. Various dibenzoxepine-fused spirooxindoles were successfully synthesized in up to 98% yield. This methodology provides libraries of structurally diverse and medicinally important small molecules that could aid in the search for new bioactive molecules.
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Affiliation(s)
- Ramesh Samikannu
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Sankaranarayanan Sethuraman
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Nagaraja Akula
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Vignesh Radhakrishnan
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Srinivasarao Kamisetti
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Shabana Banu
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Muthalagu Vetrichelvan
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Anuradha Gupta
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India.
| | - Jianqing Li
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, 100 Binney St., Cambridge, MA 02142, USA
| | - Richard Rampulla
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 5400, Princeton, New Jersey 08543-4000, USA
| | - Arvind Mathur
- Department of Discovery Synthesis, Biocon Bristol Myers Squibb R&D Centre, Syngene International Ltd., Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV, Bangalore 560100, India. and Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 5400, Princeton, New Jersey 08543-4000, USA
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