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Zou LM, Huang XY, Zheng C, Cheng YZ, You SL. Chiral Brønsted Acid-Catalyzed Intramolecular Asymmetric Allylic Alkylation of Indoles with Primary Alcohols. Org Lett 2022; 24:3544-3548. [PMID: 35533379 DOI: 10.1021/acs.orglett.2c01253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Herein, chiral Brønsted acid-catalyzed intramolecular asymmetric allylic alkylation of indoles with allylic primary alcohols is described. The allyl alcohols were directly employed as the allylic precursors in this metal-free protocol, without preactivation or any additional activating reagents. This method provides the convenient synthesis of a broad range of functionalized tetrahydrocarbazoles in excellent yields (≤97%) with good enantioselectivity (≤93% ee). The optimal conditions are compatible for gram-scale reaction.
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Affiliation(s)
- Lei-Ming Zou
- School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Xian-Yun Huang
- School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Yuan-Zheng Cheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shu-Li You
- School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, China.,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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Galkin KI, Ananikov VP. The Increasing Value of Biomass: Moving From C6 Carbohydrates to Multifunctionalized Building Blocks via 5-(hydroxymethyl)furfural. ChemistryOpen 2020; 9:1135-1148. [PMID: 33204585 PMCID: PMC7646257 DOI: 10.1002/open.202000233] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/06/2020] [Indexed: 12/26/2022] Open
Abstract
Recent decades have been marked by enormous progress in the field of synthesis and chemistry of 5-(hydroxymethyl)furfural (HMF), an important platform chemical widely recognized as the "sleeping giant" of sustainable chemistry. This multifunctional furanic compound is viewed as a strong link for the transition from the current fossil-based industry to a sustainable one. However, the low chemical stability of HMF significantly undermines its synthetic potential. A possible solution to this problem is synthetic diversification of HMF by modifying it into more stable multifunctional building blocks for further synthetic purposes.
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Affiliation(s)
- Konstantin I. Galkin
- Zelinsky Institute of Organic ChemistryRussian Academy of SciencesLeninsky Prospekt, 47Moscow119991Russia
- N. E. Bauman Moscow State Technical University2nd Baumanskaya Street, 5/1Moscow105005Russia
| | - Valentine P. Ananikov
- Zelinsky Institute of Organic ChemistryRussian Academy of SciencesLeninsky Prospekt, 47Moscow119991Russia
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