1-(5-Methyl-2-thienyl)ethan-1-one
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1-(5-Methyl-2-thienyl)ethan-1-one ??
- ???
- 24-28 °C(lit.)
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- 65-67 °C1 mm Hg(lit.)
- ??
- 1.106 g/mL at 25 °C(lit.)
- ???
- n
20/D 1.561(lit.)
- ???
- >230 °F
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- under inert gas (nitrogen or Argon) at 2–8 °C
- ??? ??
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- Specific Gravity
- 1.119
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- ???? ??? ? 1.00%. ???? ?? ? ???? ??? ???? ???? ??? ???? ???
- ?? ??
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- Light Sensitive
- JECFA Number
- 2107
- BRN
- 110854
- LogP
- 2.04
- CAS ??????
- 13679-74-8(CAS DataBase Reference)
1-(5-Methyl-2-thienyl)ethan-1-one C??? ??, ??, ??
??? ??
white to light yellow crystal powder??
2-Acetyl-5-methylthiophene may be used in the preparation of:- 2-ethyl-5-methylthiophene
- (5-methylthiophen-2-yl)glyoxal
- (2E)-1-(5-methylthiophen-2-yl)-3-(pyridin-3-yl)prop-2-en-1-one
- ethyl 3-(5-methylthiophen-2-yl)-3-oxopropanoate
?? ??
2-Acetyl-5-methylthiophene is a volatile organic compound formed during the reaction between L-cysteine and dihydroxyacetone in glycerine or triglyceride solvent system. It can be prepared by reacting 2-methylthiophene with acetic anhydride. 2-Acetyl-5-methylthiophene undergoes palladium-catalyzed cross-coupling reaction with aryl bromides to form C-4 arylated product. It reacts with 1,2-bis(5-formyl-2-methylthiophen-3-yl)cyclopentene via Aldol condensation to form a chalcone with photochromic property. The standard molar enthalpies of combustion, formation and vaporization of 2-acetyl-5-methylthiophene are 4341.9 ± 1.8kJ/mol, 158.0 ± 2.1kJ/mol and 62.0 ± 2.6kJ/mol, respectively.Safety Profile
A poison by intraperitoneal route. A flammable liquid. When heated to decomposition it emits toxic vapors of SOx.1-(5-Methyl-2-thienyl)ethan-1-one ?? ?? ? ???
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1-(5-Methyl-2-thienyl)ethan-1-one ?? ??
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1-(5-Methyl-2-thienyl)ethan-1-one ?? ??:
1-(5-Methyl-2-thienyl)ethan-1-one
2-Methyl-5-propionylthiophene
2-ACETYL-3-AMINO-5-PHENYLTHIOPHENE
2-ACETYL-5-CYANOTHIOPHENE
5-Acetylthiophene-2-carboxylic acid
1-(3-methyl-2-thienyl)ethan-1-on
1-(4-methyl-2-thienyl)ethan-1-one
2-Acetylthiophene
1-[3-AMINO-5-(4-CHLOROPHENYL)-2-THIENYL]ETHAN-1-ONE
2-ACETYL-3-AMINO-5-T-BUTYLTHIOPHENE
1-{5-[3-(DIMETHYLAMINO)PROP-1-YNYL]-2-THIENYL}ETHAN-1-ONE
1-(5-ETHYL-THIOPHEN-2-YL)-ETHANONE
3-(2-ACETYL-5-TERT-BUTYL-THIOPHEN-3-YLCARBAMOYL)-ACRYLIC ACID
N-(2-ACETYL-5-TERT-BUTYL-THIOPHEN-3-YL)-SUCCINAMIC ACID
1-(3,5-DIMETHYL-2-THIENYL)ETHAN-1-ONE
2-[5-(2-CHLOROACETYL)-2-THIENYL]ACETIC ACID
N1-(2-ACETYL-5-PHENYLTHIEN-3-YL)-2-CHLOROACETAMIDE
N1-[2-ACETYL-5-(TERT-BUTYL)-3-THIENYL]-2,3,3-TRICHLOROACRYLAMIDE