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Honegger P, Roller A, Widhalm M. Synthesis and characterization of enantiopure planar-chiral phosphorus-linked diferrocenes. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2021; 77:152-160. [PMID: 33664166 PMCID: PMC7941264 DOI: 10.1107/s2053229621001996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 02/19/2021] [Indexed: 11/24/2022]
Abstract
Six new homochiral diferrocenyl derivatives have been synthesized, one of which is purely planar–chiral. Even if the two diferrocene subunits are identical, they are distinguished due to their positions relative to the substituents at the phosphorous prochiral centre. In the course of an ongoing synthetic project on cyclic diferrocenylphosphines, we obtained a group of planar–chiral diferrocenyl compounds useful as precursors for subsequent cyclization. Here we report the crystal structures of two symmetric compounds [(FcA)2(Ph)P], one of which contains four stereogenic centres (two C chiral and two planar chiral centres), i.e. 1,1′-(phenylphosphanediyl)bis{(2Sp)-2-[(1R)-1-(acetyloxy)ethyl]ferrocene}, [Fe2(C5H5)2(C24H25O4P)], and the other phosphine sulfide is a purely planar–chiral compound (two planar chiral centres), i.e. bis[(2Sp)--2-ethenylferrocen-1-yl]phenylphosphane sulfide, [Fe2(C5H5)2(C20H17PS)]. Owing to the stereocentres present, reactions performed on [(FcA)2(Ph)P]-type compounds strongly favour one ferrocene unit over the other due to diastereoselectivity. Furthermore, we present four related structures where the ferrocene units are not identical [(FcA)(FcB)(Ph)P]. These are {(2Sp)-2-[(1R)-1-(acetyloxy)ethyl]ferrocen-1-yl}[(2Sp)-2-ethenylferrocen-1-yl]phenyl-(S)-phosphine sulfide, [Fe2(C5H5)2(C22H21O2PS)], [(2Sp)-2-ethenylferrocen-1-yl]{(2Sp)-2-[(1R)-1-hydroxyethyl]ferrocen-1-yl}phenyl-(S)-phosphine sulfide, [Fe2(C5H5)2(C20H19OPS)], {(2Sp)-2-[(1R)-1-(acetyloxy)ethyl]ferrocen-1-yl}{(2Sp)-2-[(1R)-1-hydroxyethyl]ferrocen-1-yl}phenyl-(R)-phosphine sulfide, [Fe2(C5H5)2(C22H23O3PS)], and {(2Sp)-2-[(1R)-1-benzylamino)ethyl]ferrocen-1-yl}[(2Sp)-2-ethenylferrocen-1-yl]phenyl-(S)-phosphine sulfide, [Fe2(C5H5)2(C27H26NPS)]. All of the structures are accessible in one step from known precursors.
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Affiliation(s)
- Philipp Honegger
- Department of Computational Biological Chemistry, University of Vienna, Waehringer Strasse 17, A-1090 Vienna, Austria
| | - Alexander Roller
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, A-1090 Vienna, Austria
| | - Michael Widhalm
- Department of Chemical Catalysis, Faculty of Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria
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Abstract
We describe the synthesis of planar-chiral diferrocene compounds 4, 7 and 12, intended as key precursors for a new family of asymmetric catalyst ligands with less complex structures than their popular equivalents. In contrast to conventional 1,2-disubstituted ferrocenes containing center-chiral and planar-chiral elements, these compounds are purely planar-chiral due to the absence of α-substiuted ethyl groups. The title compounds 4, 7 and 12 were obtained from known precursors in 87%, 59% and 60% yields, respectively.
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Abstract
Ferrocene-based compounds are powerful asymmetric ligands usable for chemical catalysis. We present the synthesis of six new homochiral diferroceno cycles potentially useful as P,O-, P,N- or P,S-ligands. Due to the stereoconservative nature of the SN1 reaction at carbons adjacent to ferrocene units, we obtained a single diastereomer of the 8-membered diferroceno[c,f]heterophosphocines in all cases.
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Formaldehyde-1,1″-(phenylphosphinidenesulfide)bis[(2S)-2-[(1R)-1-(methylamino)-ethyl]]ferrocene-aminal. MOLBANK 2019. [DOI: 10.3390/m1090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the course of an ongoing synthetic project, we observed an unprecedented reactivity of N-methyl groups in bis(N,N-dimethylaminoethylferrocenyl)phenylphosphinesulfide upon treatment with manganese dioxide (MnO2). The intramolecular course of this reaction resulted in the formation of an unexpected homochiral diaza macrocycle. The target structure was accessible in two steps from known N,N-dimethylaminoethylferrocene.
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Kim JJ, Lim CR, Reddy BM, Park SE. Hierarchical porous organic polymer as an efficient metal-free catalyst for acetalization of carbonyl compounds with alcohols. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.10.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lazar A, Betsy K, Vinod C, Singh A. Ru(II)-functionalized SBA-15 as highly chemoselective, acid free and sustainable heterogeneous catalyst for acetalization of aldehydes and ketones. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2017.10.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Islam SS, Bhanja P, Ghosh K, Molla RA, Yasmin N, Das D, Islam SM. Mesoporous Zirconium Oxophosphate: An Efficient Catalyst for the Synthesis of Cyclic Acetals and Cyclic Carbonates under Solvent-Free Conditions. ChemistrySelect 2017. [DOI: 10.1002/slct.201701541] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sk. Safikul Islam
- Department of Chemistry; University of Kalyani, Kalyani; Nadia 741235, W.B. India
- Department of Chemistry; Aliah University; Kolkata, West Bengal 700156 India
| | - Piyali Bhanja
- Department of Materials Science; Indian Association for the Cultivation of Science; Jadavpur, Kolkata 700 032 India
| | - Kajari Ghosh
- Department of Chemistry; University of Burdwan; Burdwan 713104, W.B. India
| | - Rostam Ali Molla
- Department of Chemistry; University of Burdwan; Burdwan 713104, W.B. India
| | - Nasima Yasmin
- Department of Chemistry; Aliah University; Kolkata, West Bengal 700156 India
| | - Debasis Das
- Department of Chemistry; University of Burdwan; Burdwan 713104, W.B. India
| | - Sk. Manirul Islam
- Department of Chemistry; University of Kalyani, Kalyani; Nadia 741235, W.B. India
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Zong Y, Rao Y. Developing Pd(II) catalyzed double sp3 C-H alkoxylation for synthesis of symmetric and unsymmetric acetals. Org Lett 2014; 16:5278-81. [PMID: 25264564 DOI: 10.1021/ol502377x] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
An effective Pd(II) catalyzed double unactivated C(sp(3))-H alkoxylation has been developed to prepare both symmetric and unsymmetric acetals. This new reaction demonstrates good functional group tolerance, excellent reactivity, and high yields. A variety of novel acetals can be readily accessed via this new method.
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Affiliation(s)
- Yu Zong
- MOE Key Laboratory of Protein Sciences, Department of Pharmacology and Pharmaceutical Sciences, School of Medicine and School of Life Sciences, Tsinghua University , Beijing 100084, China
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Milosevic S, Togni A. Enantioselective 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine Imines to Unsaturated Nitriles Catalyzed by NiII–Pigiphos. J Org Chem 2013; 78:9638-46. [DOI: 10.1021/jo401247d] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Sandra Milosevic
- Department of Chemistry and
Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Antonio Togni
- Department of Chemistry and
Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, CH-8093 Zürich, Switzerland
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Polat MF, Hettmanczyk L, Zhang W, Szabo Z, Franzén J. One-Pot, Two-Step Protocol for the Catalytic Asymmetric Synthesis of Optically Active N,O- and O,O-Acetals. ChemCatChem 2013. [DOI: 10.1002/cctc.201200860] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Kim JH, Čorić I, Vellalath S, List B. Die katalytische asymmetrische Acetalisierung. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300120] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kim JH, Čorić I, Vellalath S, List B. The Catalytic Asymmetric Acetalization. Angew Chem Int Ed Engl 2013; 52:4474-7. [DOI: 10.1002/anie.201300120] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Indexed: 11/07/2022]
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Mandal S, Verma PR, Mukhopadhyay B, Gupta P. Organoiridium complexes: efficient catalysts for the formation of sugar acetals and ketals. Carbohydr Res 2011; 346:2007-10. [PMID: 21632036 DOI: 10.1016/j.carres.2011.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 05/08/2011] [Accepted: 05/10/2011] [Indexed: 12/01/2022]
Abstract
[Cp(∗)IrCl(2)](2) is used as an efficient promoter for the synthesis of sugar acetals and ketals with good to excellent yields. The catalyst is found to be general for a wide range of sugars.
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Affiliation(s)
- Soumik Mandal
- Indian Institute of Science Education and Research-Kolkata, Mohanpur, Nadia, West Bengal, India
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Mejía E, Togni A. Rhenium Complexes Containing the Chiral Tridentate Ferrocenyl Ligand Pigiphos. Organometallics 2011. [DOI: 10.1021/om200621y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Esteban Mejía
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, CH-8093 Zürich, Switzerland
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Affiliation(s)
- Ilija Čorić
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany
| | - Sreekumar Vellalath
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany
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Sadow AD, Togni A. Enantioselective Addition of Secondary Phosphines to Methacrylonitrile: Catalysis and Mechanism. J Am Chem Soc 2005; 127:17012-24. [PMID: 16316248 DOI: 10.1021/ja0555163] [Citation(s) in RCA: 138] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly enantioselective intermolecular hydrophosphination reaction is described. The (Pigiphos)nickel(II)-catalyzed reaction of secondary phosphines and methacrylonitrile gives chiral 2-cyanopropylphosphines in good yield and high enantiomeric excess (ee's up to 94%; (R)-(S)-Pigiphos = bis[(R)-1-[(S)-2-(diphenylphosphino)ferrocenyl]ethyl}cyclohexylphos phine). We propose a mechanism involving coordination of methacrylonitrile to the dicationic nickel catalyst followed by 1,4-addition of the phosphine, and then, rate-determining proton transfer. This mechanism is supported by (a) the experimentally determined rate law (rate = k'[Ni][methacrylonitrile][t-Bu(2)PH]), (b) a large primary deuterium isotope effect k(H)/k(D) = 4.6(1) for the addition of t-Bu(2)PH(D) at 28.3 degrees C in toluene-d(8), (c) the isolation and characterization of the species [Ni(kappa(3)-Pigiphos)(kappaN-methacrylonitrile)](2+), and (d) DFT calculations of model compounds.
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Affiliation(s)
- Aaron D Sadow
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Hönggerberg, Zürich
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Sadow AD, Haller I, Fadini L, Togni A. Nickel(II)-Catalyzed Highly Enantioselective Hydrophosphination of Methacrylonitrile. J Am Chem Soc 2004; 126:14704-5. [PMID: 15535679 DOI: 10.1021/ja0449574] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The dicationic Ni(II) complex [Ni(Pigiphos)(THF)](ClO4)2, [1](ClO4)2 ((R)-(S)-Pigiphos = bis-{(R)-1-[(S)-2-(diphenylphosphino)ferrocenyl]ethyl}cyclohexylphosphine), catalyzes the addition of bulky aliphatic secondary phosphines to methaacrylonitrile. This hydrophosphination reaction reaches TON = 900 and enantioselectivities up to 94%. A catalytic cycle involving 1,4-conjugate addition of R2PH to methacrylonitrile is supported by the isolation and characterization of a catalytically active N-coordinated, methacrylonitrile Ni complex.
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Affiliation(s)
- Aaron D Sadow
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Hönggerberg, CH-8093 Zürich, Switzerland
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18
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Barbaro P, Bianchini C, Giambastiani G, Togni A. Ruthenium(II) Complexes with Triphosphane Ligands Combining Planar, Phosphorus, and Carbon Chirality: Application to Asymmetric Reduction of Trifluoroacetophenone. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300264] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Hintermann L, Perseghini M, Barbaro P, Togni A. Complexes of Rhodium(
I
) and Iridium(
I
) with the Chiral Tridentate Phosphane Pigiphos: Structure and Reactivity Studies. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200390082] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lukas Hintermann
- Department of Chemistry, Swiss Federal Institute of Technology, ETH Hönggerberg, 8093 Zürich, Switzerland, Fax: (internat.) + 41‐1/632‐1310
| | - Mauro Perseghini
- Department of Chemistry, Swiss Federal Institute of Technology, ETH Hönggerberg, 8093 Zürich, Switzerland, Fax: (internat.) + 41‐1/632‐1310
| | | | - Antonio Togni
- Department of Chemistry, Swiss Federal Institute of Technology, ETH Hönggerberg, 8093 Zürich, Switzerland, Fax: (internat.) + 41‐1/632‐1310
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Hierso JC, Amardeil R, Bentabet E, Broussier R, Gautheron B, Meunier P, Kalck P. Structural diversity in coordination chemistry of tridentate and tetradentate polyphosphines of Group 6 to 10 transition metal complexes. Coord Chem Rev 2003. [DOI: 10.1016/s0010-8545(02)00221-7] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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