1
|
Wong A, Alcántara G, Avalos M, Wu G, Ménard G. Facile Synthesis of (C
6
F
5
)
2
BBr and (C
6
F
5
)
2
BX(OEt
2
) (X=Cl, Br) using Hydrogen Halides and Piers’ Borane. Z Anorg Allg Chem 2023. [DOI: 10.1002/zaac.202300007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Anthony Wong
- Department of Chemistry and Biochemistry University of California, Santa Barbara Santa Barbara California 93106 USA
| | - Gustavo Alcántara
- Department of Chemistry and Biochemistry University of California, Santa Barbara Santa Barbara California 93106 USA
| | - Matthew Avalos
- Department of Chemistry and Biochemistry University of California, Santa Barbara Santa Barbara California 93106 USA
| | - Guang Wu
- Department of Chemistry and Biochemistry University of California, Santa Barbara Santa Barbara California 93106 USA
| | - Gabriel Ménard
- Department of Chemistry and Biochemistry University of California, Santa Barbara Santa Barbara California 93106 USA
- Department of Chemistry University of Calgary 2500 University Drive NW Calgary Alberta T2N 1N4 Canada
| |
Collapse
|
2
|
Zhang J, Xie Z. Tri-insertion with dearomatization of terminal arylalkynes using a carborane based frustrated Lewis pair template. Chem Sci 2020; 12:1745-1749. [PMID: 34163934 PMCID: PMC8179331 DOI: 10.1039/d0sc05755j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Intramolecular vicinal Frustrated Lewis Pairs (FLPs) have played a significant role in the activation of small molecules, and their stabilities and reactivities are found to strongly depend on the nature of the bridging units. This work reports a new carborane based FLP, 1-PPh2-2-BPh2-1,2-C2B10H10 (2), which reacts with an equimolar amount of p-R2NC6H4C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
CH (R = Me, Et, Ph) at room temperature to give CC triple bond addition products 1,2-[PPh2C(R2NC6H4)
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
CHBPh2]-1,2-C2B10H10 (3) in high yields. Compounds 3 react further with two equiv. of p-R2NC6H4CCH (R = Me, Et) at 60–70 °C to give unprecedented stereoselective tri-insertion products, 3,3a,6,6a-tetrahydronaphtho[1,8a-b]borole tricycles (4), in which one of the aryl rings from arylacetylene moieties has been dearomatized with the formation of four stereocenters including one quaternary carbon center. It is noted that the phosphine unit functions as a catalyst during the reactions. After trapping and structural characterization of a key intermediate, a reaction mechanism is proposed, involving sequential alkyne insertion and 1,2-boryl migration. A carborane based frustrated Lewis pair enables tri-insertion with dearomatization of arylalkynes, forming unprecedented products, borole tricycles, with the construction of four stereocenters including one quaternary carbon center in one process.![]()
Collapse
Affiliation(s)
- Jian Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin New Territories Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin New Territories Hong Kong China
| |
Collapse
|
3
|
Sharma MK, Sinhababu S, Mahawar P, Mukherjee G, Pandey B, Rajaraman G, Nagendran S. Donor-acceptor-stabilised germanium analogues of acid chloride, ester, and acyl pyrrole compounds: synthesis and reactivity. Chem Sci 2019; 10:4402-4411. [PMID: 31057767 PMCID: PMC6472437 DOI: 10.1039/c8sc05380d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/17/2019] [Indexed: 01/02/2023] Open
Abstract
Germaacid chloride, germaester, and N-germaacyl pyrrole compounds were not known previously. Therefore, donor-acceptor-stabilised germaacid chloride (i-Bu)2ATIGe(O)(Cl) → B(C6F5)3 (1), germaester (i-Bu)2ATIGe(O)(OSiPh3) → B(C6F5)3 (2), and N-germaacyl pyrrole (i-Bu)2ATIGe(O)(NC4H4) → B(C6F5)3 (3) compounds, with Cl-Ge[double bond, length as m-dash]O, Ph3SiO-Ge[double bond, length as m-dash]O, and C4H4N-Ge[double bond, length as m-dash]O moieties, respectively, are reported here. Germaacid chloride 1 reacts with PhCCLi, KOt-Bu, and RLi (R = Ph, Me) to afford donor-acceptor-stabilised germaynone (i-Bu)2ATIGe(O)(CCPh) → B(C6F5)3 (4), germaester (i-Bu)2ATIGe(O)(Ot-Bu) → B(C6F5)3 (5), and germanone (i-Bu)2ATIGe(O)(R) → B(C6F5)3 (R = Ph 6, Me 7) compounds, respectively. Interconversion between a germaester and a germaacid chloride is achieved; reaction of germaesters 2 and 5 with TMSCl gave germaacid chloride 1, and 1 reacted with Ph3SiOLi and KOt-Bu to produce germaesters 2 and 5. Reaction of N-germaacyl pyrrole 3 with thiophenol produced a donor-acceptor-stabilised germaacyl thioester (i-Bu)2ATIGe(O)(SPh) → B(C6F5)3 (10). Furthermore, the attempted syntheses of germaamides and germacarboxylic acids are also discussed.
Collapse
Affiliation(s)
- Mahendra Kumar Sharma
- Department of Chemistry , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110 016 , India .
| | - Soumen Sinhababu
- Department of Chemistry , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110 016 , India .
| | - Pritam Mahawar
- Department of Chemistry , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110 016 , India .
| | - Goutam Mukherjee
- Department of Chemistry , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110 016 , India .
| | - Bhawana Pandey
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India
| | - Gopalan Rajaraman
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India
| | - Selvarajan Nagendran
- Department of Chemistry , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110 016 , India .
| |
Collapse
|
4
|
Liu W, Zeng R, Han Y, Wang Y, Tao H, Chen Y, Liu F, Liang Y. Computational and experimental investigation on the BCl3 promoted intramolecular amination of alkenes and alkynes. Org Biomol Chem 2019; 17:2776-2783. [DOI: 10.1039/c9ob00264b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The BCl3 promoted aminoboration of alkenes and alkynes was investigated both computationally and experimentally, leading to the discovery of a metal-free hydroamination of alkynes.
Collapse
Affiliation(s)
- Wei Liu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Ruxin Zeng
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yingbin Han
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yajun Wang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Huimin Tao
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Fang Liu
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| |
Collapse
|
5
|
Wilkins LC, Günther BAR, Walther M, Lawson JR, Wirth T, Melen RL. Contrasting Frustrated Lewis Pair Reactivity with Selenium- and Boron-Based Lewis Acids. Angew Chem Int Ed Engl 2016; 55:11292-5. [PMID: 27484052 PMCID: PMC5113806 DOI: 10.1002/anie.201605239] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Indexed: 01/11/2023]
Abstract
The activation of π-bonds in diynyl esters has been investigated by using soft and hard Lewis acids. In the case of the soft selenium Lewis acid PhSeCl, sequential activation of the alkyne bonds leads initially to an isocoumarin (1 equiv PhSeCl) and then to a tetracyclic conjugated structure with the isocoumarin subunit fused to a benzoselenopyran (3 equiv PhSeCl). Conversely, the reaction with the hard Lewis acidic borane B(C6 F5 )3 initiates a cascade reaction to yield a complex π-conjugated system containing phthalide and indene subunits.
Collapse
Affiliation(s)
- Lewis C Wilkins
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Cymru/Wales, CF10 3AT, UK
| | - Benjamin A R Günther
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Cymru/Wales, CF10 3AT, UK
| | - Melanie Walther
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Cymru/Wales, CF10 3AT, UK
| | - James R Lawson
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Cymru/Wales, CF10 3AT, UK
| | - Thomas Wirth
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Cymru/Wales, CF10 3AT, UK
| | - Rebecca L Melen
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Cymru/Wales, CF10 3AT, UK.
| |
Collapse
|
6
|
Affiliation(s)
- Elena Buñuel
- Departamento de Química Orgánica; Facultad de Ciencias; Universidad Autónoma de Madrid; Av. Francisco Tomás y Valiente 7, Cantoblanco 28049 Madrid Spain
| | - Diego J. Cárdenas
- Departamento de Química Orgánica; Facultad de Ciencias; Universidad Autónoma de Madrid; Av. Francisco Tomás y Valiente 7, Cantoblanco 28049 Madrid Spain
| |
Collapse
|
7
|
Wilkins LC, Günther BAR, Walther M, Lawson JR, Wirth T, Melen RL. Gegensätzliche Reaktivität frustrierter Lewis-Paare mit Selen- und Bor-basierten Lewis-Säuren. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lewis C. Wilkins
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff Cymru/Wales CF10 3AT Großbritannien
| | - Benjamin A. R. Günther
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff Cymru/Wales CF10 3AT Großbritannien
| | - Melanie Walther
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff Cymru/Wales CF10 3AT Großbritannien
| | - James R. Lawson
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff Cymru/Wales CF10 3AT Großbritannien
| | - Thomas Wirth
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff Cymru/Wales CF10 3AT Großbritannien
| | - Rebecca L. Melen
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff Cymru/Wales CF10 3AT Großbritannien
| |
Collapse
|
8
|
Sinhababu S, Yadav D, Karwasara S, Sharma MK, Mukherjee G, Rajaraman G, Nagendran S. The Preparation of Complexes of Germanone from a Germanium μ-Oxo Dimer. Angew Chem Int Ed Engl 2016; 55:7742-6. [PMID: 27238633 DOI: 10.1002/anie.201601445] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Indexed: 11/08/2022]
Abstract
Complexes of germanone containing formal Ge=O→M bonds (M=Zn, B, Ge, Sn) were isolated and characterized. The compounds were prepared through a novel synthetic route using a germanium μ-oxo dimer 3 as the starting material. This method circumvents the need to employ germanones to prepare complexes of germanones.
Collapse
Affiliation(s)
- Soumen Sinhababu
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Dhirendra Yadav
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Surendar Karwasara
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Mahendra Kumar Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Goutam Mukherjee
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Selvarajan Nagendran
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India.
| |
Collapse
|
9
|
Sinhababu S, Yadav D, Karwasara S, Sharma MK, Mukherjee G, Rajaraman G, Nagendran S. The Preparation of Complexes of Germanone from a Germanium μ-Oxo Dimer. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601445] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Soumen Sinhababu
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110 016 India
| | - Dhirendra Yadav
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110 016 India
| | - Surendar Karwasara
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110 016 India
| | - Mahendra Kumar Sharma
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110 016 India
| | - Goutam Mukherjee
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110 016 India
| | - Gopalan Rajaraman
- Department of Chemistry; Indian Institute of Technology Bombay; Powai Mumbai 400076 India
| | - Selvarajan Nagendran
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas New Delhi 110 016 India
| |
Collapse
|