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Carrillo-Hermosilla F, Fernández-Galán R, Ramos A, Elorriaga D. Guanidinates as Alternative Ligands for Organometallic Complexes. Molecules 2022; 27:molecules27185962. [PMID: 36144698 PMCID: PMC9501388 DOI: 10.3390/molecules27185962] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 11/30/2022] Open
Abstract
For decades, ligands such as phosphanes or cyclopentadienyl ring derivatives have dominated Coordination and Organometallic Chemistry. At the same time, alternative compounds have emerged that could compete either for a more practical and accessible synthesis or for greater control of steric and electronic properties. Guanidines, nitrogen-rich compounds, appear as one such potential alternatives as ligands or proligands. In addition to occurring in a plethora of natural compounds, and thus in compounds of pharmacological use, guanidines allow a wide variety of coordination modes to different metal centers along the periodic table, with their monoanionic chelate derivatives being the most common. In this review, we focused on the organometallic chemistry of guanidinato compounds, discussing selected examples of coordination modes, reactivity and uses in catalysis or materials science. We believe that these amazing ligands offer a new promise in Organometallic Chemistry.
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Liu JF, Pan FX, Yao S, Min X, Cui D, Sun ZM. Syntheses, Structure, and Properties of Mixed Cp–Amidinate Rare-Earth-Metal(III) Complexes. Organometallics 2014. [DOI: 10.1021/om400856d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun-Feng Liu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Fu-Xing Pan
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Shuang Yao
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, People’s Republic of China
| | - Xue Min
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Dongmei Cui
- Changchun Institute of Applied Chemistry, State Key Laboratory
of Polymer Physics and Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, People’s Republic of China
| | - Zhong-Ming Sun
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, People’s Republic of China
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Wang C, Zhang X, Xue M, Zhang Y, Shen Q. Unprecedented reaction of bridged bis(guanidinate) lanthanide complexes: sterically induced deprotonation. Dalton Trans 2013; 42:7009-18. [DOI: 10.1039/c3dt32882a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Elorriaga D, Carrillo-Hermosilla F, Antiñolo A, Suárez FJ, López-Solera I, Fernández-Galán R, Villaseñor E. Asymmetric niobium guanidinates as intermediates in the catalytic guanylation of amines. Dalton Trans 2013; 42:8223-30. [DOI: 10.1039/c3dt50477h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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5
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Zhang X, Qian C, Wang C, Zhang Y, Wang Y, Yao Y, Shen Q. Synthesis, Molecular Structures, and Reactivity of Dianionic Guanidinate Lanthanide/Lithium Derivatives. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201100901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xingmin Zhang
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
| | - Cunwei Qian
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
| | - Chuanyong Wang
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
| | - Yong Zhang
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
| | - Yaorong Wang
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
| | - Yingming Yao
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
| | - Qi Shen
- College of Chemistry, Chemical Engineering and MaterialsScience, Soochow University, Suzhou 215123, People's Republic of China, Fax: +86‐512‐65880305
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
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Liu R, Li Z, Yi W, Chen Z, Zhou X. Reactivity of lanthanocene hydroxides toward carbodiimide and CO2: Synthesis and characterization of lanthanide ureido and carbonate complexes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.04.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Zhang J, Zhou X. Selective insertions of unsaturated organic molecules into the Ln–N or N–H bonds of biscyclopentadienyl lanthanide complexes. Dalton Trans 2011; 40:9637-48. [DOI: 10.1039/c1dt10563a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Li X, Hong J, Liu R, Weng L, Zhou X. Reactions of Cp3Y with Benzophenone: A Simple and Efficient Method for Transformation of Unsubstituted Cyclopentadienyl to Bridged ansa-Cyclopentadienyl/Alkoxyl Ligand. Organometallics 2010. [DOI: 10.1021/om100755s] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoqing Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Jianquan Hong
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Ruiting Liu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Linhong Weng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
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Pi C, Li X, Zhang L, Liu R, Weng L, Zhou X. A New Strategy for Ring Modification of Metallocenes: Carbodiimide Insertion into the η5-Y−C5H5 Bond and Subsequent Isomerization. Inorg Chem 2010; 49:7632-4. [DOI: 10.1021/ic101346b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chengfu Pi
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xiaoqing Li
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Lili Zhang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Ruiting Liu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Linhong Weng
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xigeng Zhou
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
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Bu X, Zhang Z, Zhou X. Switching from Dimerization to Cyclotrimerization Selectivity by FeCl3 in the Y[N(TMS)2]3-Catalyzed Transformation of Terminal Alkynes: A New Strategy for Controlling the Selectivity of Organolanthanide-Based Catalysis. Organometallics 2010. [DOI: 10.1021/om100402h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiuli Bu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Zhengxing Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
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Zhang J, Zhou X. Recent advances in reaction of organolanthanides containing the N−H bonds with unsaturated organic small molecules. CR CHIM 2010. [DOI: 10.1016/j.crci.2010.03.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhang Z, Bu X, Zhang J, Liu R, Zhou X, Weng L. Insertion of Ketenimines into the Ln−C σ-Bond of Organolanthanides: A New Strategy for Synthesis of Lanthanide 1-Azaallyl Complexes. Organometallics 2010. [DOI: 10.1021/om100089a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhengxing Zhang
- Department of Chemistry, Molecular Catalysis and Innovative Material Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xiuli Bu
- Department of Chemistry, Molecular Catalysis and Innovative Material Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - Jie Zhang
- Department of Chemistry, Molecular Catalysis and Innovative Material Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - Ruiting Liu
- Department of Chemistry, Molecular Catalysis and Innovative Material Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Molecular Catalysis and Innovative Material Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
| | - Linhong Weng
- Department of Chemistry, Molecular Catalysis and Innovative Material Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
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Chen CY, Lin HC, Huang YY, Chen KL, Huang JJ, Yeh MY, Wong FF. ‘One-flask’ transformation of isocyanates and isothiocyanates to guanidines hydrochloride by using sodium bis(trimethylsilyl)amide. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Vicente J, Abad JA, López-Sáez MJ, Jones P, Bautista D. Reactivity ofortho-Substituted ArylâPalladium Complexes towards Carbodiimides, Isothiocyanates, Nitriles, and Cyanamides. Chemistry 2010; 16:661-76. [DOI: 10.1002/chem.200901828] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sun Y, Zhang Z, Wang X, Li X, Weng L, Zhou X. Isocyanate diinsertion into the N-H bond of the 2-pyridylamino ligand of organolanthanides. Dalton Trans 2010:221-6. [PMID: 20023953 DOI: 10.1039/b918181d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Cp2LnNHPy]2 (Py = 2-pyridyl) (1a-e) react with phenyl isocyanate to form the N-H diinsertion products Cp2Ln[eta2:eta1-PyNCON(Ph)CONHPh](THF) (Ln = Yb (3a), Er (3b), Y (3c), Dy (3d), Gd (3e)). It has been proven that nPr2NH can abstract one PhNCO unit from 3c to form Cp2Y[eta3-OC(NHPh)NPy] (2c) and nPr2NHCONHPh (4), representing a rare example of selective release of a functional group of ligands in organolanthanide chemistry. Hydrolysis of 2c gives the organic nitrogen-containing product PyNHCONHPh (5). Moreover, 3c can also be obtained by the reaction of 2c with PhNCO. These results demonstrate that the diinsertion of PhN=C=O into the N-H bond of coordinated amino ligands might proceed in a stepwise manner. All the compounds were characterized by elemental analysis and spectroscopic properties. The structures of compounds 3a-e and 4 are also determined through X-ray single-crystal diffraction analysis.
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Affiliation(s)
- Yan Sun
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, People's Republic of China
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Edelmann FT. Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2007. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2009.06.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sun Y, Zhang Z, Wang X, Li X, Weng L, Zhou X. Lanthanide-Induced Diinsertion of Isocyanates into the N−H Bond: Synthesis, Structure, and Reactivity of Organolanthanides Containing Diureido Ligands. Organometallics 2009. [DOI: 10.1021/om900631j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan Sun
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Zhengxing Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xu Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xiaoqing Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Linhong Weng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
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Cai T, Chen X, Xu F, Zhang Y, Yao Y, Shen Q. Synthesis and molecular structures of lanthanocene amide complexes and their catalytic activity for addition of amines to nitriles. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.05.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Han Y, Zhang J, Han F, Zhang Z, Weng L, Zhou X. Investigations on Organolanthanide Derivatives with the Hydrazonido (−NHN═CPh2) Ligand: Synthesis, Crystal Structure, and Reactivity. Organometallics 2009. [DOI: 10.1021/om900246b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanan Han
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Jie Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Fuyan Han
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Zhengxing Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Linhong Weng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China
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Efficient guanylation of aromatic and heterocyclic amines catalyzed by cyclopentadienyl-free rare earth metal amides. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.12.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zhang WX, Li D, Wang Z, Xi Z. Alkyl Aluminum-Catalyzed Addition of Amines to Carbodiimides: A Highly Efficient Route to Substituted Guanidines. Organometallics 2009. [DOI: 10.1021/om801035t] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
| | - Dongzhen Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
| | - Zitao Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
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Synthesis, characterization and catalytic activity of organolanthanide(II) complexes with heterocyclic-functionalized fluorenyl ligands. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.03.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Affiliation(s)
- Nils Meyer
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34–36, 14195 Berlin, Germany
| | - Roman Rüttinger
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34–36, 14195 Berlin, Germany
| | - Peter W. Roesky
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 34–36, 14195 Berlin, Germany
- Institut für Anorganische Chemie, Universität Karlsruhe (TH), Engesserstrasse 15, 76128 Karlsruhe, Germany
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Zhang WX, Hou Z. Catalytic addition of alkyne C–H, amine N–H, and phosphine P–H bonds to carbodiimides: an efficient route to propiolamidines, guanidines, and phosphaguanidines. Org Biomol Chem 2008; 6:1720-30. [DOI: 10.1039/b800135a] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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