2-乙酰基-5-甲基噻吩，2-Acetyl-5-methylthiophene；98%

图片 2-乙酰基-5-甲基噻吩，2-Acetyl-5-methylthiophene；98%
别名：1-(5-Methyl-2-thienyl)ethanone, 1-(5-Methylthiophen-2-yl)ethan-1-one, 1-(5-Methylthiophen-2-yl)ethanone, 2-Methyl-5-acetylthiophene, 5-Methyl-2-thienyl methyl ketone, Methyl 5-methyl-2-thienyl ketone

经验公式（希尔记法）: C7H8OS CAS号: 13679-74-8 分子量: 140.20 EC 号: 237-181-2 MDL编号: MFCD00014529 PubChem化学物质编号: 24877976 NACRES: NA.22
制造商品牌: 西格玛 Sigma-Aldrich
货号（SKU）: 533610
CAS号: 13679-74-8
MDL号: MFCD00014529
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¥1,750.00

说明

一般描述

2-Acetyl-5-methylthiophene is a volatile organic compound formed during the reaction between L-cysteine and dihydroxyacetone in glycerine or triglyceride solvent system.[1] It can be prepared by reacting 2-methylthiophene with acetic anhydride.[2] 2-Acetyl-5-methylthiophene undergoes palladium-catalyzed cross-coupling reaction with aryl bromides to form C-4 arylated product.[3] It reacts with 1,2-bis(5-formyl-2-methylthiophen-3-yl)cyclopentene via Aldol condensation to form a chalcone with photochromic property.[4] 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.[5]
 

应用

2-Acetyl-5-methylthiophene may be used in the preparation of:
  • 2-ethyl-5-methylthiophene[6]
  • (5-methylthiophen-2-yl)glyoxal[7]
  • (2E)-1-(5-methylthiophen-2-yl)-3-(pyridin-3-yl)prop-2-en-1-one[8]
  • ethyl 3-(5-methylthiophen-2-yl)-3-oxopropanoate[8]

 

属性

质量水平

200

检测方案

98%

折射率

n20/D 1.561 (lit.)

bp

65-67 °C/1 mmHg (lit.)

mp

24-28 °C (lit.)

密度

1.106 g/mL at 25 °C (lit.)

SMILES字符串

CC(=O)c1ccc(C)s1

InChI

1S/C7H8OS/c1-5-3-4-7(9-5)6(2)8/h3-4H,1-2H3

InChI key

YOSDTJYMDAEEAZ-UHFFFAOYSA-N

 

安全信息

储存分类代码

11 - Combustible Solids

WGK

WGK 3

个人防护装备

Eyeshields, Gloves, type N95 (US)

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储存温度 Storage temp.常温阴凉避光
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