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HomeProduct name list(R)-(-)-2-Aminobutane

(R)-(-)-2-Aminobutane

Synonym(s):(R)-(−)-2-Aminobutane

  • CAS NO.:13250-12-9
  • Empirical Formula: C4H11N
  • Molecular Weight: 73.14
  • MDL number: MFCD00064416
  • EINECS: 236-232-6
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
(R)-(-)-2-Aminobutane Structural

What is (R)-(-)-2-Aminobutane?

Chemical properties

Colorless to light yellow liqui

The Uses of (R)-(-)-2-Aminobutane

(R)-(-)-2-Aminobutane is a chiral amine plays an important role in pharmaceutical chemistry and in organic synthesis as chiral auxiliary, which is used to determine the enantiomeric excess (ee).

The Uses of (R)-(-)-2-Aminobutane

(R)-(?)-sec-Butylamine can be used:

  • To prepare (R)-(?)-sec-butylbis(2-hydroxyethyl)amine, an intermediate for the synthesis of aminodiphosphine ligands.
  • As a substrate to demonstrate the stereochemistry of Mitsunobu reaction in the synthesis of secondary amines.
  • As a model compound in the study of singlet-triplet transitions in circular dichroism.

Purification Methods

Dry it over solid NaOH overnight and fractionate it through a short helices packed column. The L-hydrogen tartrate salt has m 139-140o (from H2O), the 1H2O has m 96o []D +18.1o (c 11, H2O), the hydrochloride has m 152o [ ] 21 -1.1o (c 13, H2O) and the benzoyl derivative crystallises from EtOH as needles with m 97o, [] 21 -34.9o (c 11, H2O). [Bruck et al. J Chem Soc 921 1956,Kjaer & Hansen Acta Chem Scand 11 898 1957.] [Beilstein 4 H 161, 4 I 372, 4 III 308, 4 IV 617.] The S -(+)-enantiomer has has same properties except for the optical rotation which has the opposite sign.

Properties of (R)-(-)-2-Aminobutane

Melting point: -105°C
Boiling point: 63 °C(lit.)
alpha  -7.5 º (c=neat 19 ºC)
Density  0.72 g/mL at 25 °C(lit.)
refractive index  n20/D 1.393(lit.)
Flash point: -19°C
storage temp.  Flammables area
form  clear liquid
pka 10.74±0.10(Predicted)
color  Colorless to Almost colorless
optical activity [α]19/D 7.5°, neat
Water Solubility  > 10 mg/L
Sensitive  Air Sensitive
Merck  14,1544
BRN  1718760
CAS DataBase Reference 13250-12-9(CAS DataBase Reference)

Safety information for (R)-(-)-2-Aminobutane

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Corrosion
Corrosives
GHS05
ghs
Exclamation Mark
Irritant
GHS07
ghs
Environment
GHS09
GHS Hazard Statements H225:Flammable liquids
H314:Skin corrosion/irritation
H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for (R)-(-)-2-Aminobutane

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