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Barrett AGM, Casely IJ, Crimmin MR, Hill MS, Lachs JR, Mahon MF, Procopiou PA. β-Diketiminato Calcium and Magnesium Amides; Model Complexes for Hydroamination Catalysis. Inorg Chem 2009; 48:4445-53. [DOI: 10.1021/ic900091x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anthony G. M. Barrett
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
| | - Ian J. Casely
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
| | - Mark. R. Crimmin
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
| | - Michael S. Hill
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
| | - Jennifer R. Lachs
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
| | - Mary F. Mahon
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
| | - Panayiotis A. Procopiou
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K., Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
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Abstract
The heteroleptic calcium amide [{ArNC(Me)CHC(Me)NAr}Ca{N(SiMe3)2}(THF)] (Ar = 2,6‐diisopropylphenyl) and the homoleptic heavier alkaline earth amides, [M{N(SiMe3)2}2(THF)2] (M = Ca, Sr and Ba) are reported as competent pre‐catalysts for the hydroamination of 1,3‐carbodiimides. Whilst the reaction scope is currently limited to reactions of aromatic amines with 1,3‐dialkylcarbodiimides, in most cases preparations in hydrocarbon solvents proceed rapidly at room temperature with catalyst loadings as low as 0.2 mol‐% and the guanidine reaction products crystallize directly from the reaction mixture. Initial studies are consistent with the intermediacy of heavier group‐2 guanidinate complexes.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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Affiliation(s)
- Jennifer R. Lachs
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK
| | - Anthony G. M. Barrett
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK
| | - Mark R. Crimmin
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK
| | | | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Panayiotis A. Procopiou
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK
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Affiliation(s)
- Nadège Boudet
- Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377 München, Germany
| | - Jennifer R. Lachs
- Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377 München, Germany
| | - Paul Knochel
- Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377 München, Germany
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