trans-1,2-Diaminocyclohexane
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| Names | |
|---|---|
| IUPAC name
(±)-trans-1,2-Cyclohexanediamine
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| Other names
chxn, 1,2-diaminocyclohexane
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| Identifiers | |
| ECHA InfoCard | 100.127.756 |
PubChem CID
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| Properties | |
| C6H14N2 | |
| Molar mass | 114.19 |
| Appearance | colourless liquid |
| Melting point | 14–15 °C (57–59 °F; 287–288 K) |
| Boiling point | 79-81 (15 mm Hg) |
| water, organic solvents | |
| Hazards | |
| Flash point | 156 °F |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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trans-1,2-Diaminocyclohexane is an organic compound with the formula C6H10(NH2)2. This diamine is a building block for chiral ligands that are useful in asymmetric catalysis.[1]
A mixture of cis- and trans-1,2-diaminocyclohexane is produced by the hydrogenation of o-phenylenediamine. The racemic trans isomer [1:1 mixture of (1R,2R)-1,2-diaminocyclohexane and (1S,2S)-1,2-diaminocyclohexane] can be separated into the two enantiomers using enantiomerically pure tartaric acid as the resolving agent.[2]
Ligands derived from chxn
Representative ligands prepared from (1R,2R)- or (1S,2S)-1,2-Diaminocyclohexane are diaminocyclohexanetetraacetic acid (CyDTAH4), Trost ligand, and the salen analogue used in the Jacobsen epoxidation.
References
- ^ Cyrille Kouklovsky, Yves Langlois "(1S,2S)-1,2-Diaminocyclohexane1" in Encyclopedia of Reagents for Organic Synthesis, 2003; John Wiley & Sons. DOI: 10.1002/047084289X.rn00145
- ^ Jay F. Larrow and Eric N. Jacobsen (2004). "(R,R)-N,N'-Bis(3,5-Di-tert-Butylsalicylidene)-1,2-Cyclohexanediamino Manganese(III) Chloride, A Highly Enantioselective Epoxidation Catalyst". Organic Syntheses; Collected Volumes, vol. 10, p. 96.