3-Ethynylthiophene

3-Ethynylthiophene Basic information

Product Name:	3-Ethynylthiophene
Synonyms:	3-ETHYNYLTHIOPHENE 96;thienylacetylene;Thiophene, 3-ethynyl- (9CI);3-Ethynylthiophene;(Thien-3-yl)acetylene;3-Thienylacethylene;Thiophene, 3-ethynyl-;3-Ethynylthiophene 96%
CAS:	67237-53-0
MF:	C6H4S
MW:	108.16
EINECS:
Product Categories:	Heterocyclic Compounds;Thiophenes;Heterocyclic Building Blocks;Building Blocks
Mol File:	67237-53-0.mol

3-Ethynylthiophene Chemical Properties

Boiling point	152-153 °C (lit.)
density	1.098 g/mL at 25 °C (lit.)
refractive index	n20/D 1.5800(lit.)
Fp	115 °F
storage temp.	Keep in dark place,Inert atmosphere,2-8°C
form	Liquid
color	Colorless to yellow to orange
Water Solubility	Slightly soluble in water.

Safety Information

Hazard Codes	Xi
Risk Statements	10-37/38-41
Safety Statements	16-26-39
RIDADR	UN 1993 3/PG 3
WGK Germany	3
HazardClass	3
PackingGroup	III
HS Code	29349990

MSDS Information

3-Ethynylthiophene Usage And Synthesis

Uses

3-Ethynylthiophene is used in preparation of benzothiazonines by rhodium-catalyzed denitrogenative annulation reactions of sulfonylaryltriazoles with thiochromones.

Uses

3-Ethynylthiophene may be used in the synthesis of the following:

1-(2-bromobenzyl)-4-(thiophen-3-yl)-1H-1,2,3-triazole which is obtained by heating with 2-iodophenylethylazide in the presence of copper acetate monohydrate catalyst in N-methyl-2-pyrrolidone
N-benzyl-1-phenyl-5-(thiophen-3-yl)-4-pentyn-2-amine via a multi-step reaction process
[(C₄H₃S-3)C≡CAg]_n, a polymeric compound obtained via reaction with silver nitrate in the presence of triethylamine in acetonitrile
4,5-bis(thiophen-3-ylethynyl)phthalonitrile via Sonogashira cross-coupling reaction with 4,5-dichlorophthalonitrile

3-Ethynylthiophene Preparation Products And Raw materials

Preparation Products

1,3,5-tri(thiophen-2-yl)benzene-->METHYL THIOPHENE-3-ACETATE-->3-(TRIMETHYLSILYLETHYNYL)THIOPHENE 97-->METHYL 3-THIOPHENECARBOXYLATE 97-->Imidazo[1,2-a]pyridine, 2-(3-thienyl)-

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3-Ethynylthiophene

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