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Peel AJ, Terzopoulos A, Jethwa RB, Choudhury D, Niu HC, Bond AD, Slaughter J, Wright DS. A chiral phosphazane reagent strategy for the determination of enantiomeric excess of amines. Chem Sci 2022; 13:5398-5412. [PMID: 35655560 PMCID: PMC9093139 DOI: 10.1039/d2sc01692c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/12/2022] [Indexed: 11/21/2022] Open
Abstract
Methods for measuring enantiomeric excess (ee) of organic molecules by NMR spectroscopy provide rapid analysis using a standard technique that is readily available. Commonly this is accomplished by chiral derivatisation of the detector molecule (producing a chiral derivatisation agent, CDA), which is reacted with the mixture of enantiomers under investigation. However, these CDAs have almost exclusively been based on carbon frameworks, which are generally costly and/or difficult to prepare. In this work, a methodology based on the readily prepared inorganic cyclodiphosph(iii)azane CDA ClP(μ-NtBu)2POBorn (Born = endo-(1S)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl) is shown to be highly effective in the measurement of ee’s of chiral amines, involving in situ reaction of the chiral amines (R*NH2) with the P–Cl bond of the CDA followed by quaternization of the phosphorus framework with methyl iodide. This results in sharp 31P NMR signals with distinct chemical shift differences between the diastereomers that are formed, which can be used to obtain the ee directly by integration. Spectroscopic, X-ray structural and DFT studies suggest that the NMR chemical shift differences between diastereomers is steric in origin, with the sharpness of these signals resulting from conformational locking of the bornyl group relative to the P2N2 ring induced by the presence of the P(v)-bonded amino group (R*NH). This study showcases cheap inorganic phosphazane CDAs as simple alternatives to organic variants for the rapid determination of ee. The simple inorganic cyclodiphosph(iii)azane chiral derivatisation agent ClP(μ-tBuN)2POBorn (Born = endo-(1S)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl) is shown to be effective in the measurement of ee’s of chiral amines using 31P NMR spectroscopy.![]()
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Affiliation(s)
- Andrew J. Peel
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Alexandros Terzopoulos
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Rajesh B. Jethwa
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Dipanjana Choudhury
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Hao-Che Niu
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Andrew D. Bond
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Jonathan Slaughter
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
- The Faraday Institution Quad One, Harwell Science and Innovation Campus, Didcot, UK
| | - Dominic S. Wright
- Yusuf Hamied Department of Chemistry, Cambridge University, Lensfield Road, Cambridge, CB2 1EW, UK
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2
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Palladium-catalyzed highly regioselective Buchwald-Hartwig amination of 5-substituted-1,2,3-triiodobenzene: Facile synthesis of 2,3-diiodinated N-arylanilines as potential anti-inflammatory candidates. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Galushko AS, Prima DO, Burykina JV, Ananikov VP. Comparative study of aryl halides in Pd-mediated reactions: key factors beyond the oxidative addition step. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01133a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The comparative experimental study of Ar–X (X = Cl, Br, I) reactivity and analysis reported herein suggest that oxidative addition cannot be considered the sole reason of the observed low reactivity of aryl chlorides.
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Affiliation(s)
- Alexey S. Galushko
- Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - Darya O. Prima
- Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - Julia V. Burykina
- Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
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4
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Kathewad N, M C A, Parvin N, Parambath S, Parameswaran P, Khan S. Facile Buchwald-Hartwig coupling of sterically encumbered substrates effected by PNP ligands. Dalton Trans 2019; 48:2730-2734. [PMID: 30720832 DOI: 10.1039/c9dt00159j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The diphosphinoamine ligands [(Ph2P)2N(Ar); 1 (Ar = C6H5), 2 (Ar = 2,6-iPr2C6H3)] were effectively utilized in Buchwald-Hartwig coupling of a range of sterically demanding substrates. The reaction was carried out using conventional and microwave routes and the latter reduces the reaction time from 3 d to 15-30 min. A broad substrate scope was achieved in this protocol and most of the coupling products are isolated on a mutligram scale. DFT calculations were carried out to elucidate the reaction mechanism.
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Affiliation(s)
- Neha Kathewad
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune-411008, India.
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5
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Plajer AJ, Garcia-Rodriguez R, Rizzuto FJ, Wright DS. Flexible Bonding of the Phosph(V)azane Dianions [S(E)P(μ-Nt
Bu)]2
2−. Chemistry 2018; 24:2013-2019. [DOI: 10.1002/chem.201705413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Alex J. Plajer
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW United Kingdom
| | - Raul Garcia-Rodriguez
- GIR MIOMeT-IU Cinquima-Química Inorgánica; Facultad de Ciencias; Universidad de Valladolid; Campus Miguel, Delibes 47011 Valladolid Spain
| | - Felix J. Rizzuto
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW United Kingdom
| | - Dominic S. Wright
- Chemistry Department; Cambridge University; Lensfield Road Cambridge CB2 1EW United Kingdom
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6
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Landge VG, Mondal A, Kumar V, Nandakumar A, Balaraman E. Manganese catalyzed N-alkylation of anilines with alcohols: ligand enabled selectivity. Org Biomol Chem 2018; 16:8175-8180. [DOI: 10.1039/c8ob01886c] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Ligand enabled earth-abundant manganese catalyzed N-alkylation of amines with alcohols via a hydrogen auto-transfer strategy is reported. The choice of the ligand plays a significant role in the alcohol reactivity (aliphatic or aromatic) toward N-alkylation reactions.
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Affiliation(s)
- Vinod G. Landge
- Organic Chemistry Division
- Dr. Homi Bhabha Road
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
| | - Akash Mondal
- Organic Chemistry Division
- Dr. Homi Bhabha Road
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
| | - Vinit Kumar
- Organic Chemistry Division
- Dr. Homi Bhabha Road
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
| | - Avanashiappn Nandakumar
- Organic Chemistry Division
- Dr. Homi Bhabha Road
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
| | - Ekambaram Balaraman
- Organic Chemistry Division
- Dr. Homi Bhabha Road
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
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7
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Yong FF, Mak AM, Wu W, Sullivan MB, Robins EG, Johannes CW, Jong H, Lim YH. Empirical and Computational Insights into N-Arylation Reactions Catalyzed by Palladium meta
-Terarylphosphine Catalyst. Chempluschem 2017; 82:750-757. [DOI: 10.1002/cplu.201700042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 03/10/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Fui Fong Yong
- Organic Chemistry, Institute of Chemical; Engineering Sciences (ICES); Agency for Science, Technology and Research (A*STAR); 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Adrian M. Mak
- Institute of High Performance Computing (IHPC); Agency for Science, Technology and Research (A*STAR); 1 Fusionopolis Way, #16-16 Connexis Singapore 138632 Singapore
| | - Wenqin Wu
- Organic Chemistry, Institute of Chemical; Engineering Sciences (ICES); Agency for Science, Technology and Research (A*STAR); 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Michael B. Sullivan
- Institute of High Performance Computing (IHPC); Agency for Science, Technology and Research (A*STAR); 1 Fusionopolis Way, #16-16 Connexis Singapore 138632 Singapore
| | - Edward G. Robins
- Singapore Bioimaging Consortium (SBIC); Agency for Science, Technology and Research (A*STAR); 11 Biopolis Way, Helios, #02-02 Singapore 138667 Singapore
| | - Charles W. Johannes
- Organic Chemistry, Institute of Chemical; Engineering Sciences (ICES); Agency for Science, Technology and Research (A*STAR); 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Howard Jong
- Organic Chemistry, Institute of Chemical; Engineering Sciences (ICES); Agency for Science, Technology and Research (A*STAR); 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Yee Hwee Lim
- Organic Chemistry, Institute of Chemical; Engineering Sciences (ICES); Agency for Science, Technology and Research (A*STAR); 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
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Abstract
This short review describes the transition metal chemistry of cyclodiphosphazanes.
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9
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Air-stable palladium(0) phosphine sulfide catalysts for Ullmann-type C–N and C–O coupling reactions. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.11.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Roth T, Wadepohl H, Wright DS, Gade LH. Chiral ditopic cyclophosphazane (CycloP) ligands: synthesis, coordination chemistry, and application in asymmetric catalysis. Chemistry 2013; 19:13823-37. [PMID: 24038171 DOI: 10.1002/chem.201302327] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Indexed: 11/10/2022]
Abstract
A series of dichlorocyclophosphazanes [{ClP(μ-NR)}2 ] containing chiral and achiral R groups was obtained from simple commercially available amines and PCl3 . Their condensation reactions with axially chiral biaryl diols yielded ansa-bridged chiral cyclophosphazane (CycloP) ligands. This highly modular methodology allows extensive elaboration of the ligand set, in which the chirality can be introduced at the diol bridge and/or the amido R group. This provides the possibility to observe match and mismatch effects in catalysis. A series of twenty CycloP ligands was synthesized and characterized by multinuclear NMR spectroscopy, HRMS, elemental analysis, and in selected cases, single-crystal X-ray diffraction. These studies show that all of the ditopic CycloP ligands are C2 symmetric, rendering their metal coordination sites symmetry equivalent. Two well-established enantioselective reactions were explored by using late-transition metal CycloP complexes as catalysts; the gold-catalyzed hydroamination of γ-allenyl sulfonamides and the asymmetric nickel-catalyzed three-component coupling of a diene and an aldehyde. The steric demands of the CycloP ligands have a subtle influence on the reactivity and selectivity observed in both reactions. Good enantiomeric ratios (e.r.) as high as 89:11 in the gold-catalyzed reaction and 92:8 in the nickel-catalyzed bis-homoallylation reaction were observed.
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Affiliation(s)
- Torsten Roth
- Anorganisch Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221-54-5609
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11
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Ding J, Chen L, Shao R, Wu J, Yun Z, Dong W. Synthesis of N,N-dimethyldodecylamine by the catalytic hydrogenation of N,N-dimethyldodecylamide. REACTION KINETICS MECHANISMS AND CATALYSIS 2013. [DOI: 10.1007/s11144-012-0505-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Nagarjuna Reddy M, Kumara Swamy KC. Dual catalysis by Cu(i): facile single step click and intramolecular C–O bond formation leading to triazole tethered dihydrobenzodioxines/benzoxazines/benzoxathiines/benzodioxepines. Org Biomol Chem 2013; 11:7350-60. [DOI: 10.1039/c3ob41332b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Beletskaya IP, Cheprakov AV. The Complementary Competitors: Palladium and Copper in C–N Cross-Coupling Reactions. Organometallics 2012. [DOI: 10.1021/om300683c] [Citation(s) in RCA: 348] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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14
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Synthesis, Structure and Electrochemical Properties of Triarylamine Bridged Dicobaltdicarbon Tetrahedrane Clusters. J CLUST SCI 2012. [DOI: 10.1007/s10876-012-0482-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Nagarjuna Reddy M, Kumara Swamy KC. Facile Construction of [6,6]-, [6,7]-, [6,8]-, and [6,9]Ring-Fused Triazole Frameworks by Copper-Catalyzed, Tandem, One-Pot, Click and Intramolecular Arylation Reactions: Elaboration to Fused Pentacyclic Derivatives. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101816] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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16
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Mono-, di- and tetranuclear rhodium(I) complexes of morpholine and N-methylpiperazine functionalized cyclodiphosph(III)azanes, cis-[( t BuN-μ)2(PNC4H8X)2] (X = O, NMe). J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0153-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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17
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Balakrishna MS, Suresh D, Mague JT. Cyclodiphosphazane appended with thioether functionality: Synthesis, transition metal chemistry and catalytic application in Suzuki–Miyaura cross-coupling reactions. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Gangadhararao G, Venu S. The Phospha-Michael addition product {(t-BuNH)P(μ-N-t-Bu)(2)P(=N-t-Bu)-C(=CH(2))CH(p-CH(3)O-C(6)H(4))-P(O)[(OCH(2)C(CH(3))(2)CH(2)O)]}. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1212-3. [PMID: 21754511 PMCID: PMC3089203 DOI: 10.1107/s1600536811014127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 04/14/2011] [Indexed: 11/10/2022]
Abstract
The title compound, 2-{2-[1,3-di-tert-butyl-4-(tert-butyl-amino)-2-(tert-butyl-imino)-1,3,2λ(5),4-diaza-diphosphetidin-2-yl]-1-(4-meth-oxy-phen-yl)prop-2-en-1-yl}-5,5-dimethyl-1,3,2λ(5)-dioxaphosphinan-2-one, C(31)H(57)N(4)O(4)P(3), was synthesized from the Phospha-Michael addition reaction of cyclo-diphos-pha-zane [(t-BuNH)P(μ-Nt-Bu)](2) and allenyl-phospho-nate [(OCH(2)C(CH(3))(2)CH(2)O)P(O)C(p-CH(3)O-C(6)H(4))=C=CH(2)]. In the crystal, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules. The structure exhibits pseudosymmetry but attempts to solve it in a higher (monoclinic) space group were unsuccessful.
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Affiliation(s)
- G Gangadhararao
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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19
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Chandrasekaran P, Mague JT, Balakrishna MS. Synthesis and Derivatization of the Bis(amido)-λ3-cyclodiphosphazanes cis-[R′(H)NP(μ-NR)]2, Including a Rare Example, trans-[tBu(H)N(Se)P(μ-NCy)]2, Showing Intermolecular Se···H-O Hydrogen Bonding. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001348] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Rodriguez S, Qu B, Haddad N, Reeves DC, Tang W, Lee H, Krishnamurthy D, Senanayake CH. Oxaphosphole-Based Monophosphorus Ligands for Palladium-Catalyzed Amination Reactions. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000878] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Kumar AS, Nagarajan R. Synthesis of α-Carbolines via Pd-Catalyzed Amidation and Vilsmeier−Haack Reaction of 3-Acetyl-2-chloroindoles. Org Lett 2011; 13:1398-401. [DOI: 10.1021/ol2000827] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arepalli Sateesh Kumar
- School of Chemistry, University of Hyderabad, Central University (P.O.), Hyderabad-500 046, India
| | - Rajagopal Nagarajan
- School of Chemistry, University of Hyderabad, Central University (P.O.), Hyderabad-500 046, India
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22
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Lü B, Li P, Fu C, Xue L, Lin Z, Ma S. 2,6-Diisopropoxyphenyl(dicyclohexyl)phosphine: A New Ligand for Palladium-Catalyzed Amination Reactions of Aryl Chlorides with Potassium Hydroxide as the Base. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000349] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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24
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Sajna KV, Srinivas V, Kumara Swamy KC. Efficient Palladium-Catalyzed Double Arylation of Phosphonoalkynes and Diarylalkynes in Water: Use of a Dinuclear Palladium(I) Catalyst. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000579] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Doǧan Ö, Demir S, Özdemir İ, Çetinkaya B. Palladium(II)NHC complexes containing benzimidazole ligand as a catalyst for CN bond formation. Appl Organomet Chem 2010. [DOI: 10.1002/aoc.1731] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Mono‐, Bi‐, Tri‐ and Tetranuclear Palladium(II), Copper(I), and Gold(I) Complexes of Morpholine‐ and
N
‐Methylpiperazine‐Functionalized Cyclodiphosph(III)azans,
cis
‐[(
t
BuN‐μ)
2
(PNC
4
H
8
X)
2
] (X = O, NMe). Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000306] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Suzuki-Miyaura, Mizoroki-Heck carbon-carbon coupling and hydrogenation reactions catalysed by PdII and RhI complexes containing cyclodiphosphazane cis-{tBuNP(OC6H4OMe-o)}2. J CHEM SCI 2010. [DOI: 10.1007/s12039-010-0014-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Kumara Swamy K, Gangadhararao G, Rama Suresh R, Bhuvan Kumar N, Chakravarty M. Exploring organic reactions using simple cyclodiphosphazanes. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Balakrishna MS. Cyclodiphosphazanes with functionalities: Synthesis, reactivity and transition metal chemistry. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Balakrishna MS, Venkateswaran R, Mague JT. Transition metal chemistry of cyclodiphosphanes containing phosphine and amide-phosphine functionalities: Formation of a stable dipalladium(II) complex containing a Pd–P σ-bond. Dalton Trans 2010; 39:11149-62. [PMID: 20936211 DOI: 10.1039/c0dt00614a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Maravanji S Balakrishna
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400 076, India, 3480.
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