cas 102936-05-0, (S)-(-)-2-(PHENYLCARBAMOYLOXY)PROPIONIC ACID | Articles data ｜lookchem

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102936-05-0

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Determination of the Enantiomeric Excesses of Chiral Acids by 19F NMR Studies of their Esters deriving from (R)-(+)-2-(Trifluoromethyl)benzhydrol
15-Chiral acids were esterified with optically pure (R)-(+)-2-(trifluoromethyl)benzhydrol (R)-(+)-1, a readily available reagent.With respect to the carboxy group, the stereogenic centre is in the β-position in the case of the acids 5a-10a and 12a-16a, and in the α position in the case of the acids 17a-20a.The diastereomeric excesses of the corresponding esters 5b-10b and 12b-20b, respectively, were easily determined by means of 19F NMR.These d.e. values were in very good agreement with the e.e. values of the corresponding acids when the latter were known compounds.
Brown, Eric,Chevalier, Christelle,Huet, Francois,Grumelec, Christelle Le,Leze, Antoine,Touet, Joel
p. 1191 - 1194
(1994)
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A NEW CHIRAL ACID FOR THE RESOLUTION OF RACEMIC BASES: (S)-(-)-(2-PHENYLCARBAMOYLOXY)PROPIONIC ACID (CARBAMALACTIC ACID).
(S)-(-)-Carbamalactic acid is the phenylcarbamate derived from natural (S)-lactic acid.This new chiral reagent was efficiently used for the resolution of racemic bases such as α-methylbenzylamine, ephedrine and α-(1-naphthyl)ethylamine.
Brown, Eric,Viot, Frederic
p. 4451 - 4452
(1985)
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329046-48-2
t-butyl 5-fluoro-3-[S-2-(phenylamino)carbonyloxypropionamido]-4-hydroxypentanoate

Chemical Properties

Appearance/Colour :white to off-white crystalline powder
Melting Point: 150 °C (dec.)(lit.)
Boiling Point: 324.7±25.0 °C at 760 mmHg
Flash Point:150.2±23.2 °C
Density: 1.3±0.1 g/cm³
Vapor Pressure: 9.87E-05mmHg at 25°C
Refractive Index: 1.5400 (estimate)
PKA: 2.85±0.10(Predicted)
PSA: 75.63000
LogP: 1.78120

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