2-bromo-2-phenylacetyl chloride

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

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

Procedure: aa) Method A: 23.65 g of 3,4-dihydroisoquinoline-1(2H)-thione was dissolved in 750 ml of chloroform, whereupon the solution was treated at room temperature while cooling firstly with 54 g of α-bromophenylacetyl chloride and 90 minutes later with 53 ml of triethylamine and the mixture was stirred at room temperature overnight. The reaction mixture was washed with water, dried over magnesium sulfate and evaporated in vacuo. There was obtained 5,6-dihydro-3-hydroxy-2-phenylthiazolo[2,3-a]isoquinolinium hydroxide (internal salt) of m.p. 210° (dec.) (from acetonitrile/dioxane). was treated at room temperature The reaction mixture was washed with water dried over magnesium sulfate evaporated in vacuo

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

Procedure: aa) Method A: 29.4 g of α-bromophenylacetyl chloride were added dropwise while stirring to a solution of 23.3 g of 4,5-dihydrothieno[2,3-c]pyridine-7(6H)-thione in 630 ml of chloroform, whereby care was taken that the temperature did not exceed 25°. After 30 minutes, the mixture was treated with 25.45 g of triethylamine and stirred for an additional 3 hours. The mixture was diluted with water, the organic phase was separated, washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, evaporated and the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5). There was obtained 5,6-dihydro-3-hydroxy-2 -phenylthiazolo[3,2-a]thieno[2,3-c]pyridinium hydroxide (internal salt) of m.p. 225° (dec.) (from dioxane/acetonitrile). did not exceed 25° the organic phase was separated washed with saturated aqueous sodium chloride solution dried over magnesium sulfate evaporated the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5)

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

Procedure: 66.95 g of thieno[2,3-d]pyridazine-7(6H)-thione are suspended in 3200 ml of methylene chloride under argon, whereupon 102.7 g of α-bromophenylacetyl chloride are added dropwise thereto. The mixture is stirred at room temperature for about 30 minutes and then 121 ml of triethylamine are added dropwise thereto, whereby the mixture is cooled to 25°-30°. It is stirred for about 40 minutes. After evaporation of the solvent in vacuo, the residue is taken up in 1000 ml of water and 200 ml of ether, whereupon the mixture is stirred for about 30 minutes. The separated crystals are removed by filtration under suction, washed with water and ether and dried overnight. The dried crystals are again triturated with 1000 ml of water. After suction filtration, the red-violet crystals are washed with water and dried in vacuo. There is obtained 3-hydroxy-2-phenylthiazolo[3,2-b]thieno [2,3-d]-pyridazin-4-ium hydroxide (internal salt) of m.p. 260°-264° (decomposition). are added dropwise whereby the mixture is cooled to 25°-30° It is stirred for about 40 minutes After evaporation of the solvent in vacuo 200 ml of ether, whereupon the mixture is stirred for about 30 minutes The separated crystals are removed by filtration under suction washed with water and ether dried overnight The dried crystals are again triturated with 1000 ml of water After suction filtration the red-violet crystals are washed with water dried in vacuo

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

Procedure: 66.95 g of thieno[2,3-d]pyridazine-7(6H)-thione are suspended in 3200 ml of methylene chloride under argon, whereupon 102.7 g of α-bromophenylacetyl chloride are added dropwise thereto. The mixture is stirred at room temperature for about 30 minutes and then 121 ml of triethylamine are added dropwise thereto, whereby the mixture is cooled to 25°-30°. It is stirred for about 40 minutes. After evaporation of the solvent in vacuo, the residue is taken up in 1000 ml of water and 200 ml of ether, whereupon the mixture is stirred for about 30 minutes. The separated crystals are removed by filtration under suction, washed with water and ether and dried overnight. The dried crystals are again triturated with 1000 ml of water. After suction filtration, the red-violet crystals are washed with water and dried in vacuo. There is obtained 3-hydroxy-2-phenylthiazolo[3,2-b]thieno [2,3-d]-pyridazin-4-ium hydroxide (internal salt) of m.p. 260°-264° (decomposition). are added dropwise whereby the mixture is cooled to 25°-30° It is stirred for about 40 minutes After evaporation of the solvent in vacuo 200 ml of ether, whereupon the mixture is stirred for about 30 minutes The separated crystals are removed by filtration under suction washed with water and ether dried overnight The dried crystals are again triturated with 1000 ml of water After suction filtration the red-violet crystals are washed with water dried in vacuo

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

Procedure: aa) Method A: 23.65 g of 3,4-dihydroisoquinoline-1(2H)-thione was dissolved in 750 ml of chloroform,. whereupon the solution was treated at room temperature while cooling firstly with 54 g of α-bromophenylacetyl chloride and 90 minutes later with 53 ml of triethylamine and the mixture was stirred at room temperature overnight. The reaction mixture was washed with water, dried over magnesium sulfate and evaporated in vacuo. There was obtained 5,6-dihydro-3-hydroxy-2 -phenylthiazolo[2,3-a]isoquinolinium hydroxide (internal salt) of m.p. 210° (dec.) (from acetonitrile/dioxane). whereupon the solution was treated at room temperature The reaction mixture was washed with water dried over magnesium sulfate evaporated in vacuo

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

Procedure: aa) Method A: 29.4 g of α-bromophenylacetyl chloride were added dropwise while stirring to a solution of 23.3 g of 4,5-dihydrothieno[2,3-c]pyridine-7(6H)-thione in 630 ml of chloroform, whereby care was taken that the temperature did not exceed 25°. After 30 minutes, the mixture was treated with 25.45 g of triethylamine and stirred for an additional 3 hours. The mixture was diluted with water, the organic phase was separated, washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, evaporated and the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5). There was obtained 5,6-dihydro-3-hydroxy-2 -phenylthiazolo[3.2-a]thieno[2,3-c]pyridinium hydroxide (internal salt) of m.p. 225° (dec.) (from dioxane/acetonitrile). did not exceed 25° the organic phase was separated washed with saturated aqueous sodium chloride solution dried over magnesium sulfate evaporated the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5)

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

Procedure: (aa) Method A: 23.65 g of 3,4-dihydroisoquinoline-1(2H)-thione was dissolved in 750 ml of chloroform, whereupon the solution was treated at room temperature while cooling firstly with 54 g of α-bromophenylacetyl chloride and 90 minutes later with 53 ml of triethylamine and the mixture was stirred at room temperature overnight. The reaction mixture was washed with water, dried over magnesium sulfate and evaporated in vacuo. There was obtained 5,6-dihydro-3-hydroxy-2-phenylthiazolo[2,3-a]isoquinolinium hydroxide (internal salt) of m.p. 210° (dec.) (from acetonitrile/dioxane). was treated at room temperature The reaction mixture was washed with water dried over magnesium sulfate evaporated in vacuo

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

Procedure: (aa) Method A: 29.4 g of α-bromophenylacetyl chloride were added dropwise while stirring to a solution of 23.3 g of 4,5-dihydrothieno[2,3-c]pyridine-7(6H)-thione in 630 ml of chloroform, whereby care was taken that the temperature did not exceed 25°. After 30 minutes, the mixture was treated with 25.45 g of triethylamine and stirred for an additional 3 hours. The mixture was diluted with water, the organic phase was separated, washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, evaporated and the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5). There was obtained 5,6-dihydro-3-hydroxy-2-phenylthiazolo[3,2-a]thieno[2,3-c]pyridinium hydroxide (internal salt) of m.p. 225° (dec.) (from dioxane/acetonitrile). did not exceed 25° the organic phase was separated washed with saturated aqueous sodium chloride solution dried over magnesium sulfate evaporated the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5)

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

Procedure: (aa) Method A: 23.65 g of 3,4-dihydroisoquinoline-1(2H)-thione was dissolved in 750 ml of chloroform, whereupon the solution was treated at room temperature while cooling firstly with 54 g of α-bromophenylacetyl chloride and 90 minutes later with 53 ml of triethylamine and the mixture was stirred at room temperature overnight. The reaction mixture was washed with water, dried over magnesium sulfate and evaporated in vacuo. There was obtained 5,6-dihydro-3-hydroxy-2-phenylthiazolo[2,3-a]isoquinolinium hydroxide (internal salt) of m.p. 210° (dec.) (from acetonitrile/dioxane). was treated at room temperature The reaction mixture was washed with water dried over magnesium sulfate evaporated in vacuo

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

Procedure: (aa) Method A: 23.65 g of 3,4-dihydroisoquinoline-1(2H)-thione was dissolved in 750 ml of chloroform, whereupon the solution was treated at room temperature while cooling firstly with 54 g of α-bromophenylacetyl chloride and 90 minutes later with 53 ml of triethylamine and the mixture was stirred at room temperature overnight. The reaction mixture was washed with water, dried over magnesium sulfate and evaporated in vacuo. There was obtained 5,6-dihydro-3-hydroxy-2-phenylthiazolo[2,3-a]isoquinolinium hydroxide (internal salt) of m.p. 210° (dec.) (from acetonitrile/dioxane). was treated at room temperature The reaction mixture was washed with water dried over magnesium sulfate evaporated in vacuo

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

Procedure: (aa) Method A: 29.4 g of α-bromophenylacetyl chloride were added dropwise while stirring to a solution of 23.3 g of 4,5-dihydrothieno[2,3-c]pyridine-7(6H)-thione in 630 ml of chloroform, whereby care was taken that the temperature did not exceed 25°. After 30 minutes, the mixture was treated with 25.45 g of triethylamine and stirred for an additional 3 hours. The mixture was diluted with water, the organic phase was separated, washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, evaporated and the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5). There was obtained 5,6-dihydro-3-hydroxy-2-phenylthiazolo[3,2-a]thieno[2,3-c]pyridinium hydroxide (internal salt) of m.p. 225° (dec.) (from dioxane/acetonitrile). did not exceed 25° the organic phase was separated washed with saturated aqueous sodium chloride solution dried over magnesium sulfate evaporated the residue was chromatographed on silica gel (elution agent toluene/ethanol 95:5)