2-isothiocyanato-1,1-dimethoxyethane

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: Methanol (200 mL) was saturated with ammonia and stirred with isothiocyanatoacetaldehyde dimethyl acetal (5.0 g) for 2 h. The mixture was concentrated and the residue was chromatographed (silica gel, 5% methanol/dichloromethane) to give the title compound. The mixture was concentrated the residue was chromatographed (silica gel, 5% methanol/dichloromethane)

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

Procedure: A mixture of 4.8 parts of 1-isothiocyanato-2,2-dimethoxyethane, 4.2 parts of 4-fluorobenzenemethanamine and 90 parts of tetrahydrofuran was stirred overnight. The reaction mixture was evaporated, yielding 8.9 parts (99%) of N-(2,2-dimethoxyethyl)-N'-[(4-fluorophenyl)methyl]thiourea (188). The reaction mixture was evaporated

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

Procedure: Methanol (200 mL) was saturated with ammonia and stirred with isothiocyanatoacetaldehyde dimethyl acetal (5.0 g) for 2 h. The mixture was concentrated and the residue was chromatographed (silica gel, 5% methanol/dichloromethane) to give the title compound. The mixture was concentrated the residue was chromatographed (silica gel, 5% methanol/dichloromethane)

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

Procedure: Methanol (200 mL) was saturated with ammonia and stirred with isothiocyanatoacetaldehyde dimethyl acetal (5.0 g) for 2 h. The mixture was concentrated and the residue was chromatographed (silica gel, 5% methanol/dichloromethane) to give the title compound. The mixture was concentrated the residue was chromatographed (silica gel, 5% methanol/dichloromethane)

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

Procedure: Methanol (200 mL) was saturated with ammonia and stirred with isothiocyanatoacetaldehyde dimethyl acetal (5.0 g) for 2 h. The mixture was concentrated and the residue was chromatographed (silica gel, 5% methanol/dichloromethane) to give the title compound. The mixture was concentrated the residue was chromatographed (silica gel, 5% methanol/dichloromethane)

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

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

Procedure: Methanol (200 mL) was saturated with ammonia and stirred with isothiocyanatoacetaldehyde dimethyl acetal (5.0 g) for 2 h. The mixture was concentrated and the residue was chromatographed (silica gel, 5% methanol/dichloromethane) to give the title compound. The mixture was concentrated the residue was chromatographed (silica gel, 5% methanol/dichloromethane)

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

Procedure: A mixture of 10.8 parts of 4-(1-piperazinyl)phenol dihydrobromide, 2.6 parts of 2-isothiocyanato-1,1-dimethoxyethane and 54 parts of methanol is stirred and refluxed for 30 minutes. Then there are added 4.7 parts of sodium hydroxide and the whole is stirred overnight at room temperature. The precipitated product is filtered off and crystallized from 4-methyl-2-pentanone, yielding 4.9 parts of N-(2,2-dimethoxyethyl)-4-(4-hydroxyphenyl)-1-piperazinecarbothioamide; mp. 161.4° C. refluxed for 30 minutes the whole is stirred overnight at room temperature The precipitated product is filtered off crystallized from 4-methyl-2-pentanone

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

Procedure: 2,2-Dimethoxyethyl isothiocyanate (37.7 g) is added in the course of 1 hour to a solution of hydrazine hydrate (14.35 g) in ethanol (40 cc), whilst stirring at a temperature of between 5° and 9° C. After 12 hours at 4° C., the mixture is concentrated to dryness at 20° C. under reduced pressure (20 mm Hg; 2.7 kPa). The yellow syrup obtained crystallises after seeding. The solid is dissolved in hot methanol (50 cc) and the solution is filtered and diluted with diethyl ether (200 cc). After about ten hours at 4° C., the mixture is filtered and 4-(2,2-dimethoxyethyl)-thiosemicarbazide (32.3 g) is obtained in the form of a white solid. the mixture is concentrated to dryness at 20° C. under reduced pressure (20 mm Hg; 2.7 kPa) The yellow syrup obtained crystallises The solid is dissolved in hot methanol (50 cc) the solution is filtered diluted with diethyl ether (200 cc) After about ten hours at 4° C. the mixture is filtered

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

Procedure: Methanol (200 mL) was saturated with ammonia and stirred with isothiocyanatoacetaldehyde dimethyl acetal (5.0 g) for 2 h. The mixture was concentrated and the residue was chromatographed (silica gel, 5% methanol/dichloromethane) to give the title compound. The mixture was concentrated the residue was chromatographed (silica gel, 5% methanol/dichloromethane)