30086-64-7

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: 1 g of octahydro 2H-benzimidazol-2-thione and 1.3 ml of bromopropane in 20 ml of ethanol are heated under reflux until complete dissolution is obtained. The solvent is evaporated off under reduced pressure, the residue is taken up in a minimum amount of dichloromethane, isopropyl ether is added, the solvents are evaporated off under reduced pressure, the residue is recrystallized from isopropyl ether, the expected product is separated off and dried with a yield of 95%. under reflux until complete dissolution is obtained The solvent is evaporated off under reduced pressure is added the solvents are evaporated off under reduced pressure the residue is recrystallized from isopropyl ether the expected product is separated off dried with a yield of 95%

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

Procedure: To a mixture of 67 g. of carbon disulfide in 300 ml. of ethanol is added dropwise with stirring a solution of 100 g. of 1,2-diaminocyclohexane in 100 ml. of ethanol. The resulting solution is stirred one-half hour after addition; liquid eliminated and the residue dissolved in 300 ml. of water and heated at reflux for 18 hours. The precipitate which forms on cooling is filtered off, washed with water and then with ether and dried under reduced pressure to obtain 3a,4,5,6,7,7a-hexahydro-2-benzimidazolin-thione, m.p. 170°C. To a mixture of 67 g The resulting solution is stirred one-half hour after addition the residue dissolved in 300 ml at reflux for 18 hours on cooling is filtered off washed with water with ether and dried under reduced pressure

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

Procedure: 1 g of octahydro 2H-benzimidazol-2-thione and 1.3 ml of bromopropane in 20 ml of ethanol are heated under reflux until complete dissolution is obtained. The solvent is evaporated off under reduced pressure, the residue is taken up in a minimum amount of dichloromethane, isopropyl ether is added, the solvents are evaporated off under reduced pressure, the residue is recrystallized from isopropyl ether, the expected product is separated off and dried with a yield of 95%. under reflux until complete dissolution is obtained The solvent is evaporated off under reduced pressure is added the solvents are evaporated off under reduced pressure the residue is recrystallized from isopropyl ether the expected product is separated off dried with a yield of 95%