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Mandal S, Chaudhari RD, Biswas G. Advances in mercury(II)-salt-mediated cyclization reactions of unsaturated bonds. Beilstein J Org Chem 2021; 17:2348-2376. [PMID: 34621398 PMCID: PMC8450975 DOI: 10.3762/bjoc.17.153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 08/27/2021] [Indexed: 11/23/2022] Open
Abstract
The synthesis of complex cyclic compounds is extremely challenging for organic chemists. Many transition-metal-salt-mediated cyclizations are reported in literature. Hg(II) salts have been successfully employed in cyclizations to form complex heterocyclic and carbocyclic structures that are impossible to synthesize with other transition metal salts. In this review, we have summarized cyclization reactions that are performed with Hg(II) salts. These salts are also successfully applied in stoichiometric or catalytic amounts to form complex cyclic structures and natural products.
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Affiliation(s)
- Sumana Mandal
- Department of Chemistry, Cooch Behar Panchanan Barma University, Panchanan Nagar, Vivekananda Street, Cooch Behar - 736101, West Bengal, India
| | - Raju D Chaudhari
- Department of Chemistry, Cooch Behar Panchanan Barma University, Panchanan Nagar, Vivekananda Street, Cooch Behar - 736101, West Bengal, India
| | - Goutam Biswas
- Department of Chemistry, Cooch Behar Panchanan Barma University, Panchanan Nagar, Vivekananda Street, Cooch Behar - 736101, West Bengal, India
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2
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Paraja M, Gini A, Sakai N, Matile S. Pnictogen‐Bonding Catalysis: An Interactive Tool to Uncover Unorthodox Mechanisms in Polyether Cascade Cyclizations. Chemistry 2020; 26:15471-15476. [DOI: 10.1002/chem.202003426] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/05/2020] [Indexed: 12/28/2022]
Affiliation(s)
- Miguel Paraja
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Andrea Gini
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry University of Geneva Geneva Switzerland
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3
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Abstract
We present the first examples of tethered olefin functionalization reactions using a silanol auxiliary. A range of allylic alcohols are readily condensed with di-tert-butylsilyl bis(trifluoromethanesulfonate) to form allylic silanols. When treated with Hg(OTf)2 and NaHCO3, these silanols easily transform into cyclic silanediol organomercurial compounds. In most cases, the reactions are exquisitely diastereoselective. The scale can be increased more than 10-fold without a loss of yield and selectivity. We demonstrate that the silanediols are versatile synthons for a variety of further reactions.
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Affiliation(s)
- Anand H Shinde
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66047, United States
| | - Shyam Sathyamoorthi
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66047, United States
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4
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Setterholm NA, McDonald FE. Sequential exo-mode oxacyclizations for the synthesis of the CD substructure of brevenal. J Antibiot (Tokyo) 2019; 72:364-374. [PMID: 30607013 DOI: 10.1038/s41429-018-0124-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/19/2018] [Accepted: 10/27/2018] [Indexed: 11/09/2022]
Abstract
We describe a novel strategy for synthesizing the CD bicyclic ether substructure of the fused polycyclic ether natural product brevenal. This product arises from a three-step sequence beginning with (1) regio- and diastereoselective iodoetherification of an acyclic diene-diol, followed by (2) alkene metathesis with an epoxyalkene synthon, concluding with (3) palladium-catalyzed cycloisomerization. Despite the modest yield and long reaction period for the cycloisomerization step, these studies provide valuable insights into the nature of byproducts generated and the mechanisms by which they form. This work demonstrates a portion of a larger synthetic strategy for constructing the pentacyclic core of brevenal from an acyclic precursor.
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Affiliation(s)
| | - Frank E McDonald
- Department of Chemistry, Emory University, Atlanta, GA, 30322, USA.
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5
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Zhao JX, Yu YY, Wang SS, Huang SL, Shen Y, Gao XH, Sheng L, Li JY, Leng Y, Li J, Yue JM. Structural Elucidation and Bioinspired Total Syntheses of Ascorbylated Diterpenoid Hongkonoids A–D. J Am Chem Soc 2018; 140:2485-2492. [DOI: 10.1021/jacs.7b10135] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Xin Zhao
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Yan-Yan Yu
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, People’s Republic of China
| | - Sha-Sha Wang
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Su-Ling Huang
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Yu Shen
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Xin-Hua Gao
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, People’s Republic of China
| | - Li Sheng
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Jing-Ya Li
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Ying Leng
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Jia Li
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
| | - Jian-Min Yue
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People’s Republic of China
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6
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Hurtak JA, McDonald FE. Synthesis of the ABC Substructure of Brevenal by Sequential exo-Mode Oxacyclizations of Acyclic Polyene Precursors. Org Lett 2017; 19:6036-6039. [DOI: 10.1021/acs.orglett.7b02538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jessica A. Hurtak
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Frank E. McDonald
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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7
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Muthusamy G, Pansare SV. Modular synthesis of allyl vinyl ethers for the enantioselective construction of functionalized quaternary stereocenters. RSC Adv 2016. [DOI: 10.1039/c6ra24284g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
A flexible synthesis of allyl vinyl ethers, precursors of functionalized quaternary stereocenters, was developed by employing a regioselective Petasis olefination of haloallyl oxalates and subsequent cross-coupling with alkyl- and aryl boronic acids.
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Affiliation(s)
| | - Sunil V. Pansare
- Department of Chemistry
- Memorial University
- St. John's
- Canada A1B3X7
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8
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Grammatikopoulou M, Thysiadis S, Sarli V. Gold-catalyzed spiro-N,O-ketal synthesis. Org Biomol Chem 2015; 13:1169-78. [DOI: 10.1039/c4ob02050b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method for the synthesis of spiro-N,O-ketals with 5- and 6-membered rings was developed via a gold-catalyzed spiroamidoketalization of alkynyl amidoalcohols under mild conditions.
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Affiliation(s)
- M. Grammatikopoulou
- Faculty of Chemistry
- Aristotle University of Thessaloniki
- University Campus
- 54124 Thessaloniki
- Greece
| | - S. Thysiadis
- Faculty of Chemistry
- Aristotle University of Thessaloniki
- University Campus
- 54124 Thessaloniki
- Greece
| | - V. Sarli
- Faculty of Chemistry
- Aristotle University of Thessaloniki
- University Campus
- 54124 Thessaloniki
- Greece
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E. McDonald F, L. Stoltz K, R. Alba AN, B. Wieliczko M, Bacsa J. Iodoetherification of Conformationally Restricted Dienyl Alcohols: Unexpected Formation of Oxocenes by 8-endo-mode Oxacyclizations. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)54] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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