2-bromobutanenitrile

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-butyl-8-chloro-7-(2-propen-1-yl)-3,7-dihydro-1H-purine-2,6-dione (2.0 g, 0.0072 mol) in dry MeCN (20 ml) was added Cs2CO3 (4.68 g, 0.0144 mol) followed by bromobutyronitrile (1.38 g, 0.0094 mol). The mixture was heated at 80° C. for 18 h and then allowed to cool. The reaction mixture was evaporated and the crude product partitioned between EtOAc and HCl (2N). The organic phase was separated and washed with brine, dried (MgSO4) and evaporated to give the crude product. This was purified by silica SPE (50 g), eluting with cyclohexane:ethylacetate (2:1 to 1:1) to afford the title compound as a clear oil (2.1 g, 85%). to cool The reaction mixture was evaporated the crude product partitioned between EtOAc and HCl (2N) The organic phase was separated washed with brine dried (MgSO4) evaporated to give the crude product This was purified by silica SPE (50 g) eluting with cyclohexane:ethylacetate (2:1 to 1:1)

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

Procedure: To solution of 3-mercaptobenzoic acid (250 mg, 1.62 mmole) in ethanol (10 ml), anhydrous potassium carbonate (896 mg, 6.48 mmole) was added followed by bromobutyronitrile (239.97 mg, 1.62 mmole). The reaction mixture was refluxed overnight. The ethanol was evaporated and water added. The basic solution was extracted with ethyl acetate. The aqueous layer was acidified and the resulting precipitate filtered and dried to yield 196 mg product. M.S. m/s 220 (M−1)+. 1H NMR (DMSO) δ 1.79 (2H, m, —CH2-), 2.37 (2H, t, —CH2-), 3.02 (2H, t, —CH2-), 7.56 (1H, d, 1×ArH), 7.74 (1H, d, 1×ArH), 7.83 (1H, bs, 1H, 1×ArH). The reaction mixture was refluxed overnight The ethanol was evaporated water added The basic solution was extracted with ethyl acetate the resulting precipitate filtered dried

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

Procedure: To solution of 3-mercaptobenzoic acid (250 mg, 1.62 mmole) in ethanol (10 ml), anhydrous potassium carbonate (896 mg, 6.48 mmole) was added followed by bromobutyronitrile (239.97 mg, 1.62 mmole). The reaction mixture was refluxed overnight. The ethanol was evaporated and water added. The basic solution was extracted with ethyl acetate. The aqueous layer was acidified and the resulting precipitate filtered and dried to yield 196 mg product. M.S. m/s 220 (M−1)+. 1H NMR (DMSO) δ 1.79 (2H, m, —CH2-), 2.37 (2H, t, —CH2-), 3.02 (2H, t, —CH2-), 7.56 (1H, d, 1×ArH), 7.74 (1H, d, 1×ArH), 7.83 (1H, bs, 1H, 1×ArH). The reaction mixture was refluxed overnight The ethanol was evaporated water added The basic solution was extracted with ethyl acetate the resulting precipitate filtered dried

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

Procedure: To solution of 3-mercaptobenzoic acid (250 mg, 1.62 mmole) in ethanol (10 ml), anhydrous potassium carbonate (896 mg, 6.48 mmole) was added followed by bromobutyronitrile (239.97 mg, 1.62 mmole). The reaction mixture was refluxed overnight. The ethanol was evaporated and water added. The basic solution was extracted with ethyl acetate. The aqueous layer was acidified and the resulting precipitate filtered and dried to yield 196 mg product. M.S. m/s 220 (M−1)+. 1H NMR (DMSO) δ 1.79 (2H, m, —CH2-), 2.37 (2H, t, —CH2-), 3.02 (2H, t, CH2), 7.56 (1H, d, 1×ArH), 7.74 (1H, d, 1×ArH), 7.83 (1H, bs, 1H, 1×ArH). The reaction mixture was refluxed overnight The ethanol was evaporated water added The basic solution was extracted with ethyl acetate the resulting precipitate filtered dried

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-butyl-8-chloro-7-(2-propen-1-yl)-3,7-dihydro-1H-purine-2,6-dione (2.0 g, 0.0072 mol) in dry MeCN (20 ml) was added Cs2CO3 (4.68 g, 0.0144 mol) followed by bromobutyronitrile (1.38 g, 0.0094 mol). The mixture was heated at 80° C. for 18 h and then allowed to cool. The reaction mixture was evaporated and the crude product partitioned between EtOAc and HCl (2N). The organic phase was separated and washed with brine, dried (MgSO4) and evaporated to give the crude product. This was purified by silica SPE (50 g), eluting with cyclohexane:ethylacetate (2:1 to 1:1) to afford the title compound as a clear oil (2.1 g, 85%). to cool The reaction mixture was evaporated the crude product partitioned between EtOAc and HCl (2N) The organic phase was separated washed with brine dried (MgSO4) evaporated to give the crude product This was purified by silica SPE (50 g) eluting with cyclohexane:ethylacetate (2:1 to 1:1)

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

Procedure: To solution of 3-mercaptobenzoic acid (250 mg, 1.62 mmole) in ethanol (10 ml), anhydrous potassium carbonate (896 mg, 6.48 mmole) was added followed by bromobutyronitrile (239.97 mg, 1.62 mmole). The reaction mixture was refluxed overnight. The ethanol was evaporated and water added. The basic solution was extracted with ethyl acetate. The aqueous layer was acidified and the resulting precipitate filtered and dried to yield 196 mg product. M.S. m/s 220 (M−1)+. 1H NMR (DMSO) δ 1.79 (2H, m, —CH2-), 2.37 (2H, t, —CH2-), 3.02 (2H, t, —CH2-), 7.56 (1H, d, 1×ArH), 7.74 (1H, d, 1×ArH), 7.83 (1H, bs, 1H, 1×ArH). The reaction mixture was refluxed overnight The ethanol was evaporated water added The basic solution was extracted with ethyl acetate the resulting precipitate filtered dried