Mosher's acid | |
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(R/S)-3,3,3-trifluoro-2- |
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Other names
Methoxy(trifluoromethyl)phenylacetic acid, MTPA |
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Identifiers | |
CAS number | 81655-41-6, (racemic) [20445-31-2] (R) [17257-71-5] (S) |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | C10H9F3O3 |
Molar mass | 234.17 |
Appearance | solid |
Melting point |
46-49°C (319-322 K) |
Boiling point |
105 - 107 °C at 1 torr |
Hazards | |
R-phrases | R36/37/38 |
S-phrases | |
Flash point | 110°C |
Related compounds | |
Related ? | Mosher's acid chloride |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Mosher's acid, or α-methoxy-α-trifluoromethylphenylacetic acid (MTPA) is a carboxylic acid which was first used by Harry Stone Mosher as a chiral derivatizing agent.[1][2][3][4] It is a chiral molecule, consisting of R and S enantiomers.
As a chiral derivatizing agent, it reacts with an alcohol or amine[5] of unknown stereochemistry to form an ester or amide. The absolute configuration of the ester or amide is then determined by proton and/or 19F NMR spectroscopy.
Mosher's acid chloride, the acid chloride form, is sometimes used because it has better reactivity.[6]