反应详情

1.64 g (10.66 mmol) of potassium tetracyanoborate, K[B(CN)4], in 5 ml of water are added dropwise with stirring to a solution of 2.76 g (10.69 mmol) of 3-ethyl-2-methylbenzothiazolium bromide in 50 ml of water. The lower liquid phase is extracted a number of times with 50 ml of dichloromethane, and the combined organic phases are dried using Mg2SO4. The solvent is subsequently removed by distillation, and the residue is dried under a reduced pressure of 1.3 Pa and at 60° C., giving 2.78 g of 3-ethyl-2-methylbenzothiazolium tetracyanoborate, corresponding to a yield of 89.1%.

1. extractionThe lower liquid phase is extracted a number of times with 50 ml of dichloromethane
2. customthe combined organic phases are dried
3. customThe solvent is subsequently removed by distillation
4. customthe residue is dried under a reduced pressure of 1.3 Pa and at 60° C.