201
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Cheng Q, Wang Y, You SL. Chemo-, Diastereo-, and Enantioselective Iridium-Catalyzed Allylic Intramolecular Dearomatization Reaction of Naphthol Derivatives. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511519] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Qiang Cheng
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Ye Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
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202
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Vitaku E, Smith DT, Njardarson JT. Metal-Free Synthesis of Fluorinated Indoles Enabled by Oxidative Dearomatization. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511149] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Edon Vitaku
- Department of Chemistry and Biochemistry; University of Arizona; 1306 E. University Blvd. Tucson AZ 85721 USA
| | - David T. Smith
- Department of Chemistry and Biochemistry; University of Arizona; 1306 E. University Blvd. Tucson AZ 85721 USA
| | - Jon T. Njardarson
- Department of Chemistry and Biochemistry; University of Arizona; 1306 E. University Blvd. Tucson AZ 85721 USA
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203
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Vitaku E, Smith DT, Njardarson JT. Metal-Free Synthesis of Fluorinated Indoles Enabled by Oxidative Dearomatization. Angew Chem Int Ed Engl 2016; 55:2243-7. [DOI: 10.1002/anie.201511149] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Indexed: 12/23/2022]
Affiliation(s)
- Edon Vitaku
- Department of Chemistry and Biochemistry; University of Arizona; 1306 E. University Blvd. Tucson AZ 85721 USA
| | - David T. Smith
- Department of Chemistry and Biochemistry; University of Arizona; 1306 E. University Blvd. Tucson AZ 85721 USA
| | - Jon T. Njardarson
- Department of Chemistry and Biochemistry; University of Arizona; 1306 E. University Blvd. Tucson AZ 85721 USA
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204
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Gu J, Xiao B, Chen Y, Du W, Chen Y. Asymmetric Diels–Alder and Cascade Reaction of Quinone Imine Ketals and 2,4‐Dienals: Construction of Chiral Benzo[
de
]quinolone Derivatives. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500860] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jing Gu
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8550‐2609
| | - Ben‐Xian Xiao
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8550‐2609
| | - Yu‐Rong Chen
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8550‐2609
| | - Wei Du
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8550‐2609
| | - Ying‐Chun Chen
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8550‐2609
- College of Pharmacy, Third Military Medical University, Chongqing 400038, People's Republic of China
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205
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Zhang M, Yu S, Hu F, Liao Y, Liao L, Xu X, Yuan W, Zhang X. Highly enantioselective [3+2] coupling of cyclic enamides with quinone monoimines promoted by a chiral phosphoric acid. Chem Commun (Camb) 2016; 52:8757-60. [DOI: 10.1039/c6cc01200k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chiral phosphoric acid promoted [3+2] coupling of cyclic enamides with quinone monoimines provided highly enantioenriched polycyclic 2,3-dihydrobenzofurans.
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Affiliation(s)
- Minmin Zhang
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Shuowen Yu
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Fangzhi Hu
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Yijun Liao
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Lihua Liao
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Xiaoying Xu
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Weicheng Yuan
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Xiaomei Zhang
- Key Laboratory for Asymmetric Synthesis and Chiraltechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
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206
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James MJ, O'Brien P, Taylor RJK, Unsworth WP. Synthesis of Spirocyclic Indolenines. Chemistry 2015; 22:2856-81. [DOI: 10.1002/chem.201503835] [Citation(s) in RCA: 217] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Indexed: 12/12/2022]
Affiliation(s)
| | - Peter O'Brien
- Department of Chemistry; University of York; York YO10 5DD UK
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207
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Wang Y, Sun M, Yin L, Shi F. Catalytic Enantioselective Arylative Dearomatization of 3-Methyl-2-vinylindoles Enabled by Reactivity Switch. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500901] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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208
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Wang SE, Wang L, He Q, Fan R. Destruction and Construction: Application of Dearomatization Strategy in Aromatic Carbon-Nitrogen Bond Functionalization. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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209
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Ocello R, De Nisi A, Jia M, Yang QQ, Monari M, Giacinto P, Bottoni A, Miscione GP, Bandini M. Gold(I)-Catalyzed Dearomative [2+2]-Cycloaddition of Indoles with Activated Allenes: A Combined Experimental-Computational Study. Chemistry 2015; 21:18445-53. [DOI: 10.1002/chem.201503598] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 12/27/2022]
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210
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Wang SE, Wang L, He Q, Fan R. Destruction and Construction: Application of Dearomatization Strategy in Aromatic Carbon-Nitrogen Bond Functionalization. Angew Chem Int Ed Engl 2015; 54:13655-8. [PMID: 26457665 DOI: 10.1002/anie.201508161] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Indexed: 01/04/2023]
Affiliation(s)
- Shuo-En Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China)
| | - Linfei Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China)
| | - Qiuqin He
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China)
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China).
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211
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Lian X, Lin L, Wang G, Liu X, Feng X. ChiralN,N′-Dioxide-Scandium(III)-Catalyzed Asymmetric Dearomatization of 2-Naphthols through an Amination Reaction. Chemistry 2015; 21:17453-8. [DOI: 10.1002/chem.201503276] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Indexed: 01/12/2023]
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212
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Han D, He Q, Fan R. Aniline Dearomatization and Silver-Catalyzed [3+3] Dipolar Cycloaddition: Efficient Construction of Oxocino[4,3,2-cd]indoles from 2-Alkynylanilines and 2-Alkynylbenzaldoximes. Angew Chem Int Ed Engl 2015; 54:14013-6. [DOI: 10.1002/anie.201507277] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Indexed: 01/11/2023]
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213
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Han D, He Q, Fan R. Aniline Dearomatization and Silver‐Catalyzed [3+3] Dipolar Cycloaddition: Efficient Construction of Oxocino[4,3,2‐
cd
]indoles from 2‐Alkynylanilines and 2‐Alkynylbenzaldoximes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Dandan Han
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China)
| | - Qiuqin He
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China)
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 (China)
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214
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Loh CCJ, Fang X, Peters B, Lautens M. Benzylic Functionalization of Anthrones via the Asymmetric Ring Opening of Oxabicycles Utilizing a Fourth-Generation Rhodium Catalytic System. Chemistry 2015; 21:13883-7. [PMID: 26310604 DOI: 10.1002/chem.201502718] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Indexed: 11/08/2022]
Abstract
While anthrones exist as privileged scaffolds in bioactive molecules, the enantioselective functionalization of anthrones is surprisingly scarce in the literature, with no asymmetric transition metal catalyzed example to date. Herein, we report the first asymmetric transition metal catalyzed benzylic functionalization of anthrones through the rhodium(I) catalyzed desymmetrization of oxabicycles. As previously developed rhodium(I) systems were found to be unsuitable for this substrate, a new robust fourth-generation [Rh(cod)OH]2 based catalytic system was developed to address synthetic challenges in this protocol.
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Affiliation(s)
- Charles C J Loh
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada)
| | - Xiang Fang
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada).,Laboratory for Advanced Material and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237 (P. R. China)
| | - Brendan Peters
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada)
| | - Mark Lautens
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada).
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215
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Abstract
Strychnine stands out from the group of classical natural products as one of the first complex compounds to be isolated in pure form and an extreme challenge to be structurally characterized. It has played a central role in natural product total syntheses and the surge in the development of innovative synthetic methods for many decades. Recently, we have accomplished one of the shortest formal total syntheses of strychnine (in ten steps and 14% overall yield or even shorter in eight steps and 10% overall yield). The evolution of a productive synthetic strategy, as well as the synthetic challenges tackled, are described here in detail, including examples of related transformations. The successful synthetic strategy was inspired by the premise that the core structure could be derived from simple aromatic indole precursors by a reductive SmI2 -induced ketyl-aryl coupling. Other key reactions included a diastereoselective reduction and a regioselective elimination protocol. Altogether one of the shortest syntheses of iso-strychnine and hence of strychnine was established.
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Affiliation(s)
- Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI), Beutenbergstrasse 11a, 07745, Jena, Germany.
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany.
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216
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Yu H, Zhang G, Huang H. Palladium-Catalyzed Dearomative Cyclocarbonylation by CN Bond Activation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201504805] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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217
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Yu H, Zhang G, Huang H. Palladium-Catalyzed Dearomative Cyclocarbonylation by CN Bond Activation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504805] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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218
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Yang D, Wang L, Kai M, Li D, Yao X, Wang R. Application of a CC Bond-Forming Conjugate Addition Reaction in Asymmetric Dearomatization of β-Naphthols. Angew Chem Int Ed Engl 2015; 54:9523-7. [DOI: 10.1002/anie.201503056] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 06/03/2015] [Indexed: 12/19/2022]
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219
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Yang D, Wang L, Kai M, Li D, Yao X, Wang R. Application of a CC Bond-Forming Conjugate Addition Reaction in Asymmetric Dearomatization of β-Naphthols. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503056] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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220
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Kubota K, Hayama K, Iwamoto H, Ito H. Enantioselective Borylative Dearomatization of Indoles through Copper(I) Catalysis. Angew Chem Int Ed Engl 2015; 54:8809-13. [DOI: 10.1002/anie.201502964] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Indexed: 11/09/2022]
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221
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Kubota K, Hayama K, Iwamoto H, Ito H. Enantioselective Borylative Dearomatization of Indoles through Copper(I) Catalysis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502964] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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222
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Zhang DY, Xu L, Wu H, Gong LZ. Chiral Iodine-Catalyzed Dearomatizative Spirocyclization for the Enantioselective Construction of an All-Carbon Stereogenic Center. Chemistry 2015; 21:10314-7. [DOI: 10.1002/chem.201501583] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Indexed: 12/27/2022]
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223
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Shao W, Li H, Liu C, Liu CJ, You SL. Copper-Catalyzed Intermolecular Asymmetric Propargylic Dearomatization of Indoles. Angew Chem Int Ed Engl 2015; 54:7684-7. [DOI: 10.1002/anie.201503042] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 04/14/2015] [Indexed: 12/31/2022]
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224
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Shao W, Li H, Liu C, Liu CJ, You SL. Copper-Catalyzed Intermolecular Asymmetric Propargylic Dearomatization of Indoles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503042] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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225
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Beemelmanns C, Reissig HU. Evolution of a Short Route to Strychnine by Using the Samarium-Diiodide-Induced Cascade Cyclization as a Key Step. Chemistry 2015; 21:8416-25. [DOI: 10.1002/chem.201500094] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Indexed: 01/15/2023]
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226
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Zhou Y, Zhuo CX, Gu Q, You SL. Intermolecular Dearomatization Reaction of Pyrroles Promoted by Silica Gel. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401150] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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227
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Liu J, Zhang X, Peng H, Jiang H, Yin B. Copper Chloride-Catalyzed Aerobic Oxidative Annulation ofN-Furfuryl-β-Enaminones:Access to Polysubstituted Pyrroles and Indoles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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228
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Du K, Guo P, Chen Y, Cao Z, Wang Z, Tang W. Enantioselective Palladium-Catalyzed Dearomative Cyclization for the Efficient Synthesis of Terpenes and Steroids. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411817] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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229
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Zhao X, Liu X, Mei H, Guo J, Lin L, Feng X. Asymmetric Dearomatization of Indoles through a Michael/Friedel-Crafts-Type Cascade To Construct Polycyclic Spiroindolines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410814] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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230
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Zhao X, Liu X, Mei H, Guo J, Lin L, Feng X. Asymmetric Dearomatization of Indoles through a Michael/Friedel-Crafts-Type Cascade To Construct Polycyclic Spiroindolines. Angew Chem Int Ed Engl 2015; 54:4032-5. [DOI: 10.1002/anie.201410814] [Citation(s) in RCA: 149] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 12/22/2015] [Indexed: 01/15/2023]
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231
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Du K, Guo P, Chen Y, Cao Z, Wang Z, Tang W. Enantioselective Palladium-Catalyzed Dearomative Cyclization for the Efficient Synthesis of Terpenes and Steroids. Angew Chem Int Ed Engl 2015; 54:3033-7. [DOI: 10.1002/anie.201411817] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Indexed: 11/06/2022]
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232
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Yang D, Wang L, Han F, Li D, Zhao D, Wang R. Intermolecular Enantioselective Dearomatization Reaction of β-Naphthol Usingmeso-Aziridine: A Bifunctional In Situ Generated Magnesium Catalyst. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410257] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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233
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Yang D, Wang L, Han F, Li D, Zhao D, Wang R. Intermolecular Enantioselective Dearomatization Reaction of β-Naphthol Usingmeso-Aziridine: A Bifunctional In Situ Generated Magnesium Catalyst. Angew Chem Int Ed Engl 2015; 54:2185-9. [DOI: 10.1002/anie.201410257] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/11/2014] [Indexed: 12/21/2022]
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234
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Nan J, Liu J, Zheng H, Zuo Z, Hou L, Hu H, Wang Y, Luan X. Direct Asymmetric Dearomatization of 2-Naphthols by Scandium-Catalyzed Electrophilic Amination. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409565] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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235
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Nan J, Liu J, Zheng H, Zuo Z, Hou L, Hu H, Wang Y, Luan X. Direct asymmetric dearomatization of 2-naphthols by scandium-catalyzed electrophilic amination. Angew Chem Int Ed Engl 2015; 54:2356-60. [PMID: 25564754 DOI: 10.1002/anie.201409565] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 11/13/2014] [Indexed: 11/11/2022]
Abstract
Catalytic asymmetric aminative dearomatization of 1-substituted 2-naphthols was successfully implemented with electrophilic azodicarboxylates under the catalysis of chiral Sc(III)/pybox complexes. This intermolecular reaction represents a hitherto unknown enantioselective C-N bond-forming process through direct dearomatization of phenolic compounds to generate chiral nitrogen-containing quaternary carbon stereocenters.
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Affiliation(s)
- Jiang Nan
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069 (China)
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236
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Zhang X, Yang ZP, Huang L, You SL. Highly Regio- and Enantioselective Synthesis of N-Substituted 2-Pyridones: Iridium-Catalyzed Intermolecular Asymmetric Allylic Amination. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409976] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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237
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Zhang X, Yang ZP, Huang L, You SL. Highly Regio- and Enantioselective Synthesis of N-Substituted 2-Pyridones: Iridium-Catalyzed Intermolecular Asymmetric Allylic Amination. Angew Chem Int Ed Engl 2014; 54:1873-6. [DOI: 10.1002/anie.201409976] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 11/09/2014] [Indexed: 01/16/2023]
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238
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Kandukuri SR, Bahamonde A, Chatterjee I, Jurberg ID, Escudero-Adán EC, Melchiorre P. X-Ray Characterization of an Electron Donor-Acceptor Complex that Drives the Photochemical Alkylation of Indoles. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409529] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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239
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Kandukuri SR, Bahamonde A, Chatterjee I, Jurberg ID, Escudero-Adán EC, Melchiorre P. X-ray characterization of an electron donor-acceptor complex that drives the photochemical alkylation of indoles. Angew Chem Int Ed Engl 2014; 54:1485-9. [PMID: 25475488 DOI: 10.1002/anie.201409529] [Citation(s) in RCA: 155] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 10/30/2014] [Indexed: 11/06/2022]
Abstract
A metal-free, photochemical strategy for the direct alkylation of indoles was developed. The reaction, which occurs at ambient temperature, is driven by the photochemical activity of electron donor-acceptor (EDA) complexes, generated upon association of substituted 1H-indoles with electron-accepting benzyl and phenacyl bromides. Significant mechanistic insights are provided by the X-ray single-crystal analysis of an EDA complex relevant to the photoalkylation and the determination of the quantum yield (Φ) of the process.
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Affiliation(s)
- Sandeep R Kandukuri
- ICIQ-Institute of Chemical Research of Catalonia, Avenida Països Catalans 16, 43007 Tarragona (Spain) http://www.iciq.org/research/research_group/prof-paolo-melchiorre/
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240
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Wang SG, Yin Q, Zhuo CX, You SL. Asymmetric Dearomatization of β-Naphthols through an Amination Reaction Catalyzed by a Chiral Phosphoric Acid. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409756] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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241
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Wang SG, Yin Q, Zhuo CX, You SL. Asymmetric dearomatization of β-naphthols through an amination reaction catalyzed by a chiral phosphoric acid. Angew Chem Int Ed Engl 2014; 54:647-50. [PMID: 25414091 DOI: 10.1002/anie.201409756] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Indexed: 11/12/2022]
Abstract
A highly efficient catalytic asymmetric dearomatization of naphthols by means of an electrophilic amination reaction catalyzed by chiral phosphoric acid is presented. This protocol provides a facile access to functionalized β-naphthalenone compounds with a chiral quaternary carbon center in excellent yields and enantioselectivity (up to 99% yield, up to 96% ee).
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Affiliation(s)
- Shou-Guo Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032 (China) http://shuliyou.sioc.ac.cn/
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242
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Ellerbrock P, Armanino N, Trauner D. Biomimetic Synthesis of the Calcineurin Phosphatase Inhibitor Dibefurin. Angew Chem Int Ed Engl 2014; 53:13414-8. [DOI: 10.1002/anie.201407088] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/24/2014] [Indexed: 11/09/2022]
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243
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Ellerbrock P, Armanino N, Trauner D. Biomimetic Synthesis of the Calcineurin Phosphatase Inhibitor Dibefurin. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407088] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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244
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Romano C, Jia M, Monari M, Manoni E, Bandini M. Metal-free enantioselective electrophilic activation of allenamides: stereoselective dearomatization of indoles. Angew Chem Int Ed Engl 2014; 53:13854-7. [PMID: 25346494 DOI: 10.1002/anie.201407518] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 09/18/2014] [Indexed: 11/11/2022]
Abstract
The effective and unprecedented chiral BINOL phosphoric acid catalyzed (1-10 mol%) dearomatization of indoles through electrophilic activation of allenamides (ee up to 94%), is documented. Besides the synthesis of 3,3-disubstituted indolenine cores, a dearomatization/hydrogen transfer cascade sequence is also presented as a new synthetic shortcut toward highly enantiomerically enriched indolines.
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Affiliation(s)
- Ciro Romano
- Department of Chemistry "G. Ciamician", Alma Mater Studiorum, University of Bologna via Selmi 2, 40126 Bologna (Italy) http://www.mbandini-group.com
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245
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Romano C, Jia M, Monari M, Manoni E, Bandini M. Metal-Free Enantioselective Electrophilic Activation of Allenamides: Stereoselective Dearomatization of Indoles. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407518] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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246
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Zhang YC, Zhao JJ, Jiang F, Sun SB, Shi F. Organocatalytic Asymmetric Arylative Dearomatization of 2,3-Disubstituted Indoles Enabled by Tandem Reactions. Angew Chem Int Ed Engl 2014; 53:13912-5. [DOI: 10.1002/anie.201408551] [Citation(s) in RCA: 179] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Indexed: 12/23/2022]
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247
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Zhang YC, Zhao JJ, Jiang F, Sun SB, Shi F. Organocatalytic Asymmetric Arylative Dearomatization of 2,3-Disubstituted Indoles Enabled by Tandem Reactions. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408551] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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248
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Tissot M, Phipps RJ, Lucas C, Leon RM, Pace RDM, Ngouansavanh T, Gaunt MJ. Gram-Scale Enantioselective Formal Synthesis of Morphine through anortho-paraOxidative Phenolic Coupling Strategy. Angew Chem Int Ed Engl 2014; 53:13498-501. [DOI: 10.1002/anie.201408435] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Indexed: 11/08/2022]
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249
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Tissot M, Phipps RJ, Lucas C, Leon RM, Pace RDM, Ngouansavanh T, Gaunt MJ. Gram-Scale Enantioselective Formal Synthesis of Morphine through anortho-paraOxidative Phenolic Coupling Strategy. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408435] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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250
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Diethelm S, Teufel R, Kaysser L, Moore BS. A multitasking vanadium-dependent chloroperoxidase as an inspiration for the chemical synthesis of the merochlorins. Angew Chem Int Ed Engl 2014; 53:11023-6. [PMID: 25147132 PMCID: PMC4226426 DOI: 10.1002/anie.201405696] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 11/10/2022]
Abstract
The vanadium-dependent chloroperoxidase Mcl24 was discovered to mediate a complex series of unprecedented transformations in the biosynthesis of the merochlorin meroterpenoid antibiotics. In particular, a site-selective naphthol chlorination is followed by an oxidative dearomatization/terpene cyclization sequence to build up the stereochemically complex carbon framework of the merochlorins in one step. Inspired by the enzyme reactivity, a chemical chlorination protocol paralleling the biocatalytic process was developed. These chemical studies led to the identification of previously overlooked merochlorin natural products.
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Affiliation(s)
- Stefan Diethelm
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093
| | - Robin Teufel
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093
| | - Leonard Kaysser
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093
| | - Bradley S. Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093, Homepage: http://scrippsscholars.ucsd.edu/bsmoore. Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093
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