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Saladrigas M, Gómez-Bengoa E, Bonjoch J, Bradshaw B. Four-Step Synthesis of (-)-4-epi-Presilphiperfolan-8α-ol by Intramolecular Iron Hydride Atom Transfer-Mediated Ketone-Alkene Coupling and Studies to Access trans-Hydrindanols with a Botryane Scaffold. Chemistry 2023; 29:e202203286. [PMID: 36537992 DOI: 10.1002/chem.202203286] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
From an (R)-(+)-pulegone-derived building block that incorporates the stereo-defined tertiary carbon bearing a methyl group, as found in the targeted sesquiterpenoid, a four-step synthesis of (-)-4-epi-presilphiperfolan-8-α-ol was achieved. The key processes involved are a ring-closing metathesis leading to a bridged alkene-tethered ketone and its subsequent FeIII -mediated metal-hydride atom transfer (MHAT) transannular cyclization. This synthetic method, implying an irreversible addition of a carbon-centered radical upon a ketone by means of a hydrogen atom transfer upon the alkoxy radical intermediate, was also applied in the synthesis of trans-fused hydrindanols structurally related to botrydial compounds.
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Affiliation(s)
- Mar Saladrigas
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028, Barcelona, Spain
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018, San Sebastián, Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028, Barcelona, Spain
| | - Ben Bradshaw
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028, Barcelona, Spain
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2
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Qi L, Dong M, Qian J, Yu S, Tong X. Pd 0 -Catalyzed Asymmetric Carbonitratation Reaction Featuring an H-Bonding-Driven Alkyl-Pd II -ONO 2 Reductive Elimination. Angew Chem Int Ed Engl 2023; 62:e202215397. [PMID: 36420824 DOI: 10.1002/anie.202215397] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/11/2022] [Accepted: 11/23/2022] [Indexed: 11/27/2022]
Abstract
Reductive elimination of alkyl-PdII -O is a synthetically useful yet underdeveloped elementary reaction. Here we report that the combination of an H-bonding donor [PyH][BF4 ] and AgNO3 additive under toluene/H2 O biphasic system can enable such elementary step to form alkyl nitrate. This results in the Pd0 -catalyzed asymmetric carbonitratations of (Z)-1-iodo-1,6-dienes with (R)-BINAP as the chiral ligand, affording alkyl nitrates up to 96 % ee. Mechanistic studies disclose that the reaction consists of oxidative addition of Pd0 catalyst to vinyl iodide, anion ligand exchange between I- and NO3 - , alkene insertion and SN 2-type alkyl-PdII -ONO2 reductive elimination. Evidences suggest that H-bonding interaction of PyH⋅⋅⋅ONO2 can facilitate dissociation of O2 NO- ligand from the alkyl-PdII -ONO2 species, thus enabling the challenging alkyl-PdII -ONO2 reductive elimination to be feasible.
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Affiliation(s)
- Linjun Qi
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University Jiaojiang, 318000, Zhejiang, China
| | - Ming Dong
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University Jiaojiang, 318000, Zhejiang, China
| | - Jinlong Qian
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University Jiaojiang, 318000, Zhejiang, China
| | - Shuling Yu
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University Jiaojiang, 318000, Zhejiang, China
| | - Xiaofeng Tong
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University Jiaojiang, 318000, Zhejiang, China
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3
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Du J, Duan J, Yang X, Duan Y, Zhou Q, Tang Q. p-Type Charge Transfer Doping of Graphene Oxide with (NiCo) 1-y Fe y O x for Air-Stable, All-Inorganic CsPbIBr 2 Perovskite Solar Cells. Angew Chem Int Ed Engl 2021; 60:10608-10613. [PMID: 33599353 DOI: 10.1002/anie.202016703] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/31/2021] [Indexed: 12/21/2022]
Abstract
The precise regulation of interfacial charge distribution highly determines the power conversion efficiency of perovskite solar cells (PSCs). Herein, inorganic (NiCo)1-y Fey Ox nanoparticle decorated graphene oxide (GO) is successfully demonstrated as a hole booster for all-inorganic CsPbIBr2 PSC free of precious metal electrode. Arising from the spontaneous electron transfer induced p-type doping of GO from edged oxygen-containing functional groups to (NiCo)1-y Fey Ox , the best all-inorganic CsPbIBr2 PSC achieves an efficiency of 10.95 % under one standard sun owing to the eliminated paradox between charge extraction and charge localization in GO surface. Furthermore, the champion device exhibits an excellent long-term stability at 10 % relative humidity without encapsulation over 70 days because of the suppressed ions migration.
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Affiliation(s)
- Jian Du
- College of Information Science and Technology, Jinan University, Guangzhou, 510632, P. R. China
| | - Jialong Duan
- College of Information Science and Technology, Jinan University, Guangzhou, 510632, P. R. China
| | - Xiya Yang
- College of Information Science and Technology, Jinan University, Guangzhou, 510632, P. R. China
| | - Yanyan Duan
- State Centre for International Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Quanzhu Zhou
- BTR New Material Group Co., Ltd., Shenzhen, China
| | - Qunwei Tang
- College of Information Science and Technology, Jinan University, Guangzhou, 510632, P. R. China
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Du J, Duan J, Yang X, Duan Y, Zhou Q, Tang Q. p
‐Type Charge Transfer Doping of Graphene Oxide with (NiCo)
1−
y
Fe
y
O
x
for Air‐Stable, All‐Inorganic CsPbIBr
2
Perovskite Solar Cells. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016703] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jian Du
- College of Information Science and Technology Jinan University Guangzhou 510632 P. R. China
| | - Jialong Duan
- College of Information Science and Technology Jinan University Guangzhou 510632 P. R. China
| | - Xiya Yang
- College of Information Science and Technology Jinan University Guangzhou 510632 P. R. China
| | - Yanyan Duan
- State Centre for International Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM) School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 P. R. China
| | | | - Qunwei Tang
- College of Information Science and Technology Jinan University Guangzhou 510632 P. R. China
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Peng C, Arya P, Zhou Z, Snyder SA. A Concise Total Synthesis of (+)-Waihoensene Guided by Quaternary Center Analysis. Angew Chem Int Ed Engl 2020; 59:13521-13525. [PMID: 32330370 PMCID: PMC7906115 DOI: 10.1002/anie.202004177] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Indexed: 11/07/2022]
Abstract
The four contiguous all-carbon quaternary centers of waihoensene, coupled with the absence of any traditional reactive functional groups other than a single alkene, render it a particularly challenging synthetic target among angular triquinane natural products. Here, we show that its polycyclic frame can be assembled concisely by using a strategically chosen quaternary center to guide the formation of the other three through judiciously selected C-C bond formation reactions. Those events, which included a unique Conia-ene cyclization and a challenging Pauson-Khand reaction, afforded a 17-step synthesis of the molecule in enantioenriched form.
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Affiliation(s)
- Cheng Peng
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Piyush Arya
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Zhiyao Zhou
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Scott A Snyder
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
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Peng C, Arya P, Zhou Z, Snyder SA. A Concise Total Synthesis of (+)‐Waihoensene Guided by Quaternary Center Analysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004177] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cheng Peng
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Piyush Arya
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Zhiyao Zhou
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Scott A. Snyder
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
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