1-BROMO-2-BUTYNE
- CAS NO.:3355-28-0
- Empirical Formula: C4H5Br
- Molecular Weight: 132.99
- MDL number: MFCD00190233
- EINECS: 608-891-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-09-13 19:17:58
What is 1-BROMO-2-BUTYNE?
Chemical properties
Clear pale yellow-greenish liquid
The Uses of 1-BROMO-2-BUTYNE
1-Bromo-2-butyne is used in the preparation of six to eight annulated ring compounds in reaction with indoles and pseudopterane (+/-)-Kallolide B, which is a marine natural product. Further, it acts as a precursor in the preparation of axially chiral teranyl compounds, alkylation of L-tryptophan methyl ester, 4-butynyloxybenzene sulfonyl chloride and mono-propargylated diene derivative. In addition to this, it is also used in the synthesis of isopropylbut-2-ynylamine, allenylcyclobutanol derivatives, allyl-[4-(but-2-ynyloxy)phenyl]sulfane, allenylindium and axially chiral teranyl compounds.
What are the applications of Application
1-Bromo-2-butyne is a chemical whic his exploited in the synthesis of axially chiral teranyl compounds
Preparation
1-bromo-2-butyne is obtained by reacting 2-butyn-1-ol and organic solvent, pyridine.First react bromoethane with metal magnesium in THF to prepare Grignard reagent, then add paraformaldehyde to Grignard reagent for Grignard reaction, separate and recover after Grignard reaction 2-butyn-1-ol, then mix 2-butyn-1-ol with organic solvent and pyridine, add phosphorus tribromide dropwise for bromination reaction, separate and recover the product after bromination reaction.
General Description
1-Bromo-2-butyne is a propargyl bromide derivative. It is one of the constitutional isomer of bromo butyne. Its Br-loss threshold photoionization breakdown diagram has been analyzed to derive dissociative photoionization thresholds to C4H5+ production. It participates in the preparation of linagliptin.
Properties of 1-BROMO-2-BUTYNE
Boiling point: | 40-41 °C/20 mmHg (lit.) |
Density | 1.519 g/mL at 25 °C (lit.) |
refractive index | n |
Flash point: | 97 °F |
storage temp. | Inert atmosphere,Room Temperature |
solubility | Miscible with acetonitrile. |
form | Liquid |
color | Clear pale yellow-greenish |
Specific Gravity | 1.519 |
BRN | 605306 |
CAS DataBase Reference | 3355-28-0(CAS DataBase Reference) |
Safety information for 1-BROMO-2-BUTYNE
Signal word | Warning |
Pictogram(s) |
Flame Flammables GHS02 Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H226:Flammable liquids H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. 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. P405:Store locked up. P403+P235:Store in a well-ventilated place. Keep cool. P501:Dispose of contents/container to..… |
Computed Descriptors for 1-BROMO-2-BUTYNE
InChIKey | LNNXOEHOXSYWLD-UHFFFAOYSA-N |
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