ChemicalBook CAS DataBase List 4-NITROTHIOPHENOL

4-NITROTHIOPHENOL synthesis

8synthesis methods

Product Name:4-NITROTHIOPHENOL
CAS Number:1849-36-1
Molecular formula:C6H5NO2S
Molecular Weight:155.17

350-46-9 Synthesis

350-46-9
514 suppliers
$10.60/1gm:

1849-36-1
173 suppliers
$16.00/1g

Yield:1849-36-1 75%

Reaction Conditions:

Stage #1:4-Fluoronitrobenzene with sodium sulfide in N,N-dimethyl-formamide at 20; for 1 h;Inert atmosphere;
Stage #2: with hydrogenchloride;zinc in waterCooling with ice;Inert atmosphere;

Steps:

General Procedure
General procedure: Into an oven-dried flask equipped with a magnetic stir bar was added aryl fluoride (1.00 g, 1.0 eq.), Na₂S (1.1 eq.) and DMF (5 mL) under argon. The reaction mixture was stirred at room temperature for 1 h. Then 1 M NaOH (50 mL) was added and was washed with CH₂Cl₂ (2 x 25 mL). The aqueous layer was acidified to pH ~ 1-2 with 6 N HCl and extracted with CH₂Cl₂ (2 x 50 mL). The combined organic layer was washed with brine (50 mL), dried over MgSO₄, filtered and concentrated under reduced pressure to provide a crude residue. To the residue was added 10% HCl (40 mL) and cooled with an ice-water bath. Then zinc dust (4 g) was added and the mixture was stirred for 1 h. Then EtOAc (100 mL) was added and the mixture was stirred for an additional 30 minutes. The organic layer was separated and washed with water (40 mL) and brine (40 mL), dried over MgSO₄, filtered and concentrated to provide the desired product with satisfactory purity.

References:

Taldone, Tony;Patel, Pallav D.;Patel, Hardik J.;Chiosis, Gabriela [Tetrahedron Letters,2012,vol. 53,# 20,p. 2548 - 2551] Location in patent:supporting information; experimental part

FullText