51
|
Liu HL, Xie MS, Qu GR, Guo HM. Organocatalytic Enantioselective Allylic Etherification of Morita–Baylis–Hillman Carbonates and Silanols. J Org Chem 2016; 81:10035-10042. [DOI: 10.1021/acs.joc.6b01931] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui-Li Liu
- Key Laboratory
of Green Chemical
Media and Reactions, Ministry of Education, Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Ming-Sheng Xie
- Key Laboratory
of Green Chemical
Media and Reactions, Ministry of Education, Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Gui-Rong Qu
- Key Laboratory
of Green Chemical
Media and Reactions, Ministry of Education, Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Hai-Ming Guo
- Key Laboratory
of Green Chemical
Media and Reactions, Ministry of Education, Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| |
Collapse
|
52
|
Affiliation(s)
- Tuo Xi
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Zhan Lu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| |
Collapse
|
53
|
Papadopoulos GN, Kokotos CG. One-Pot Amide Bond Formation from Aldehydes and Amines via a Photoorganocatalytic Activation of Aldehydes. J Org Chem 2016; 81:7023-8. [DOI: 10.1021/acs.joc.6b00488] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Giorgos N. Papadopoulos
- Laboratory of Organic Chemistry,
Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis 15771, Athens, Greece
| | - Christoforos G. Kokotos
- Laboratory of Organic Chemistry,
Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis 15771, Athens, Greece
| |
Collapse
|
54
|
Papadopoulos GN, Kokotos CG. Photoorganocatalytic One-Pot Synthesis of Hydroxamic Acids from Aldehydes. Chemistry 2016; 22:6964-7. [PMID: 27038037 DOI: 10.1002/chem.201600333] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 12/27/2022]
Abstract
An efficient one-pot synthesis of hydroxamic acids from aldehydes and hydroxylamine is described. A fast, visible-light-mediated metal-free hydroacylation of dialkyl azodicarboxylates was used to develop the subsequent addition of hydroxylamine hydrochloride. A range of aliphatic and aromatic aldehydes were employed in this reaction to give hydroxamic acids in high to excellent yields. Application of the current methodology was demonstrated in the synthesis of the anticancer medicine vorinostat.
Collapse
Affiliation(s)
- Giorgos N Papadopoulos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis, 15771, Athens, Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis, 15771, Athens, Greece.
| |
Collapse
|
55
|
Voutyritsa E, Theodorou A, Kokotos CG. Green organocatalytic α-hydroxylation of ketones. Org Biomol Chem 2016; 14:5708-13. [DOI: 10.1039/c6ob00036c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and green method for the α-hydroxylation of substituted ketones has been developed.
Collapse
Affiliation(s)
- Errika Voutyritsa
- Laboratory of Organic Chemistry
- Department of Chemistry
- National and Kapodestrian University of Athens
- Athens 15771
- Greece
| | - Alexis Theodorou
- Laboratory of Organic Chemistry
- Department of Chemistry
- National and Kapodestrian University of Athens
- Athens 15771
- Greece
| | - Christoforos G. Kokotos
- Laboratory of Organic Chemistry
- Department of Chemistry
- National and Kapodestrian University of Athens
- Athens 15771
- Greece
| |
Collapse
|
56
|
Kaplaneris N, Koutoulogenis G, Raftopoulou M, Kokotos CG. 4-Fluoro and 4-Hydroxy Pyrrolidine-thioxotetrahydropyrimidinones: Organocatalysts for Green Asymmetric Transformations in Brine. J Org Chem 2015; 80:5464-73. [PMID: 25942500 DOI: 10.1021/acs.joc.5b00283] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The synthesis of both trans- and cis-diastereomers of pyrrolidinine-thioxotetrahydropyrimidinone bearing either a fluorine or a hydroxyl group was accomplished. The new compounds were tested for their catalytic properties in a variety of asymmetric organic transformations and compared with the first generation catalyst. It was found that the new catalysts could efficiently catalyze the reactions in brine, without the use of organic solvent, and by employing an almost stoichiometric amount of reagents. Thus, the products were isolated by simple extractions, avoiding the use of chromatography in excellent yields, diastereoselectivities, and enantioselectivities.
Collapse
Affiliation(s)
- Nikolaos Kaplaneris
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Giorgos Koutoulogenis
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Marianna Raftopoulou
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| |
Collapse
|
57
|
Annese C, D'Accolti L, Armuzza V, Da Ros T, Fusco C. Epoxidation of Multi-Walled Carbon Nanotubes by Organocatalytic Oxidation. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500107] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
58
|
Chen J, Cheng B, Cao M, Lu Z. Iron-catalyzed asymmetric hydrosilylation of 1,1-disubstituted alkenes. Angew Chem Int Ed Engl 2015; 54:4661-4. [PMID: 25693877 DOI: 10.1002/anie.201411884] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Indexed: 12/24/2022]
Abstract
The highly regio- and enantioselective iron-catalyzed anti-Markovnikov hydrosilylation of 1,1-disubstituted aryl alkenes was developed using iminopyridine oxazoline ligands to afford chiral organosilanes. Additional derivatization of these products lead to chiral organosilanols, cyclic silanes, phenol derivatives, and 3-substituted 2,3-dihydrobenzofurans.
Collapse
Affiliation(s)
- Jianhui Chen
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310028 (China) http://mypage.zju.edu.cn/lu
| | | | | | | |
Collapse
|
59
|
Chen J, Cheng B, Cao M, Lu Z. Iron-Catalyzed Asymmetric Hydrosilylation of 1,1-Disubstituted Alkenes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411884] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
60
|
Theodorou A, Limnios D, Kokotos CG. One-Pot Synthesis ofO-Allylhydroxylamines through the Organocatalytic Oxidation of Tertiary Allylic Amines Followed by a [2,3]-Meisenheimer Rearrangement. Chemistry 2015; 21:5238-41. [DOI: 10.1002/chem.201406173] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Indexed: 11/06/2022]
|
61
|
Wieting JM, Fisher TJ, Schafer AG, Visco MD, Gallucci JC, Mattson AE. Preparation and Catalytic Activity of BINOL-Derived Silanediols. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403441] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
62
|
Papadopoulos GN, Limnios D, Kokotos CG. Photoorganocatalytic hydroacylation of dialkyl azodicarboxylates by utilising activated ketones as photocatalysts. Chemistry 2014; 20:13811-4. [PMID: 25186939 DOI: 10.1002/chem.201403275] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Indexed: 11/09/2022]
Abstract
A fast and efficient visible-light metal-free hydroacylation of dialkyl azodicarboxylates is described. Among a variety of activated ketones, phenyl glyoxylic acid and its ethyl ester were identified as suitable photoorganocatalysts. A range of aliphatic and aromatic aldehydes were employed, thus leading to products in high to excellent yields.
Collapse
|
63
|
Limnios D, Kokotos CG. 2,2,2-Trifluoroacetophenone: an organocatalyst for an environmentally friendly epoxidation of alkenes. J Org Chem 2014; 79:4270-6. [PMID: 24735070 DOI: 10.1021/jo5003938] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A cheap, mild, fast, and environmentally friendly oxidation of olefins to the corresponding epoxides is reported using polyfluoroalkyl ketones as efficient organocatalysts. Namely, 2,2,2-trifluoroacetophenone was identified as an improved organocatalyst for the epoxidation of alkenes. Various olefins, mono-, di-, and trisubstituted, are epoxidized chemoselectively in high to quantitative yields utilizing 2-5 mol % catalyst loading and H2O2 as the green oxidant.
Collapse
Affiliation(s)
- Dimitris Limnios
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens , Panepistimiopolis, 15771 Athens, Greece
| | | |
Collapse
|