O-(2-formyl-6-methoxyphenyl) N,N-dimethylcarbamothioate

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of N,N-dimethylthiocarbamoyl chloride (10 g) in tetrahydrofuran (40 ml) was added dropwise at <12° C. over 30 minutes to a stirred solution of 3-methoxy-2-hydroxybenzaldehyde (12.3 g) and potassium hydroxide (4.6 g) in water (105 ml) then the mixture was stirred at ambient temperature for 15 minutes. 10% Aqueous potassium hydroxide solution (30 ml) was added, then the product was extracted into toluene (3×150 ml). The combined extracts were washed with water (150 ml) then dried (MgSO4). The solvents were removed in vacuo and the residue was crystallised from methanol to give 2-(N,N-dimethylthiocarbamoyloxy)-3-methoxybenzaldehyde (10.5 g) as a yellow solid which was used without further purification. the product was extracted into toluene (3×150 ml) The combined extracts were washed with water (150 ml) then dried (MgSO4) The solvents were removed in vacuo the residue was crystallised from methanol