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Tasker NR, Rastelli EJ, Blanco IK, Burnett JC, Sharlow ER, Lazo JS, Wipf P. In-flow photooxygenation of aminothienopyridinones generates iminopyridinedione PTP4A3 phosphatase inhibitors. Org Biomol Chem 2019; 17:2448-2466. [PMID: 30746541 DOI: 10.1039/c9ob00025a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A continuous flow photooxygenation of 7-aminothieno[3,2-c]pyridin-4(5H)-ones to produce 7-iminothieno[3,2-c]pyridine-4,6(5H,7H)-diones has been developed, utilizing ambient air as the sole reactant. N-H Imines are formed as the major products, and excellent functional group tolerance and conversion on gram-scale without the need for chromatographic purification allow for facile late-stage diversification of the aminothienopyridinone scaffold. Several analogs exhibit potent in vitro inhibition of the cancer-associated protein tyrosine phosphatase PTP4A3, and the SAR supports an exploratory docking model.
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Affiliation(s)
- Nikhil R Tasker
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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Kim Y, Jun T, Mulay SV, Manjare ST, Kwak J, Lee Y, Churchill DG. Novel intramolecular π-π-interaction in a BODIPY system by oxidation of a single selenium center: geometrical stamping and spectroscopic and spectrometric distinctions. Dalton Trans 2018; 46:4111-4117. [PMID: 28275777 DOI: 10.1039/c7dt00555e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A new BODIPY system displaying an intramolecular π-π-interaction was synthesized and studied. When the selenium center was oxidized, the substituted phenyl group undergoes π-π stacking with one side of the BODIPY core. The oxidized form showed, not only a down-field shift in the NMR peak, but also splitting due to geometrical changes that arise when going from Cs to C1. The compound was characterized by X-ray diffraction; DFT methods helped elucidate the influence of the unexpected π-π stack and its connection to the photophysical properties imparted by the Se oxidation.
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Affiliation(s)
- Youngsam Kim
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea. and Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Taehong Jun
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea.
| | - Sandip V Mulay
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Sudesh T Manjare
- Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai 400098, India
| | - Jinseong Kwak
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - David G Churchill
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea. and Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea
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Panchal SP, Anand VG. Oxidative Transformation of a Tetrathia S-Confused Isophlorin into Porphyrin Cation. Org Lett 2017; 19:4854-4857. [PMID: 28876950 DOI: 10.1021/acs.orglett.7b02317] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis and redox properties of first generation S-confused isophlorins are described. Despite structural resemblance to a confused porphyrin, spectroscopic and computational studies reveal weak paratropic ring current effects in these 20π macrocycles. They display redox properties atypical of parent tetrathia isophlorins. Experimental evidence supports the oxidation of an unstable 19π neutral radical, as a transient intermediate, for the formation of a unique 18π aromatic monocationic species. Spectroscopic and structural characterization revealed the substituent dependent macrocycle oxidation unfamiliar to the chemistry of antiaromatic isophlorinoids.
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Affiliation(s)
- Santosh P Panchal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune 411008, Maharashtra, India
| | - Venkataramanarao G Anand
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune 411008, Maharashtra, India
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Gao LB, Kang WK, Yan SH, Yang CP. Studies of Substituents Impact on the Photophysical Properties of 8-Hydroxyquinoline Derivatives. HETEROATOM CHEMISTRY 2015. [DOI: 10.1002/hc.21301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Li-Bin Gao
- Institute of Chemistry and Pharmacy; Qingdao Agricultural University; Qingdao 266109 People's Republic of China
| | - Wu-Kui Kang
- Institute of Chemistry and Pharmacy; Qingdao Agricultural University; Qingdao 266109 People's Republic of China
| | - Shi-Hai Yan
- Institute of Chemistry and Pharmacy; Qingdao Agricultural University; Qingdao 266109 People's Republic of China
| | - Chun-Peng Yang
- Qingdao Institute of Biomass Energy and Bioprocess Technology; Chinese Academy of Sciences; Qingdao 266101 People's Republic of China
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Huang C, Hu Y, Zheng Y, Drees M, Pan H, Facchetti A. New Alkoxy-Functionalized Naphthodithiophene-Based Semiconducting Oligomers and Polymers. Isr J Chem 2014. [DOI: 10.1002/ijch.201400046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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