6-fluorobenzo[b]thiophene-2-carboxylic acid synthesis
- Product Name:6-fluorobenzo[b]thiophene-2-carboxylic acid
- CAS Number:142329-23-5
- Molecular formula:C9H5FO2S
- Molecular Weight:196.2
![Benzo[b]thiophene-2-carboxylic acid, 6-fluoro-, ethyl ester](/CAS/20200515/GIF/212078-68-7.gif)
212078-68-7
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142329-23-5
55 suppliers
$60.00/250mg
Yield:-
Reaction Conditions:
with sodium hydroxide in ethanol;
Steps:
R.56 Preparation of 6-fluorobenzo[b]thiophene-2-carboxylic acid
Reference Example 56 Preparation of 6-fluorobenzo[b]thiophene-2-carboxylic acid To a solution of the compound obtained in Reference Example 55 (6.10 g) in ethanol (60 ml) was added 2.5N sodium hydroxide (50 ml). The mixture was heated at reflux for 1 hour, concentrated, diluted with water, adjusted to pH 1 with 2N HCl, and extracted with ethyl acetate. The extract was washed with brine, dried over MgSO4, and concentrated to give the titled compound as colorless crystals (5.27 g). 1H-NMR (DMSO-d6) δ: 7.35 (1H, dt, J=2.6, 9.0 Hz), 7.97 (1H, dd, J=9.6, 2.6 Hz), 8.05 (1H, dd, J=9.0, 5.4 Hz), 8.11 (1H, s). IR (KBr): 1524, 1256, 1200, 918, 806, 756, 527 cm-1.
References:
US6420375,2002,B1
1550-35-2
371 suppliers
$6.00/5g
142329-23-5
55 suppliers
$60.00/250mg