2-propan-2-yloxyethyl methanesulfonate

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

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

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

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

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

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

Procedure: Combine (1H-benzimidazol-2-yl)(1-(t-butoxycarbonyl)piperidin-4-yl)amine (2.76 g, 8.72 mmol), and sodium hydride (0.38 g, 9.5 mmol) in dimethylformamide (30 mL). After 30 minutes, add 2-(isopropoxy)ethyl mesylate (0.51 g, 5.5 mmol). Heat to 80° C. After 2.5 hours, cool the reaction mixture to ambient temperature and partition between dichloromethane and a saturated aqueous sodium bicarbonate solution. Separate the layers and extract the organic layer with water and then brine. Dry the organic layer over MgSO4, filter, and evaporate in vacuo to give (1-(2-(isopropoxy)ethyl)-1H-benzimidazol-2-yl)(1-(t-butoxycarbonyl)piperidin-4-yl)amine: Rf=0.73 (silica gel, dichloromethane/methanol/concentrated ammonium hydroxide, 90/10/0.1). After 2.5 hours cool the reaction mixture to ambient temperature partition between dichloromethane Separate the layers extract the organic layer with water Dry the organic layer over MgSO4 filter evaporate in vacuo

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

Procedure: Alternately, combine 2-isopropoxyethanol (5.0 g, 48 mmol) and dichloromethane (50 mL). Cool in an ice bath. Add triethylamine (10.7 g, 105 mmol). Add dropwise methanesulfonyl chloride (1.43 g, 9.6 mmol). After 2 hours, dilute the reaction mixture with dichloromethane and extract with 1 M hydrochloric acid solution, a saturated aqueous solution of sodium bicarbonate, and then brine. Dry the organic layer over Na2SO4, filter, and evaporate in vacuo to give a residue. Distill the residue at reduced pressure to give 2-(isopropoxy)ethyl mesylate. Cool in an ice bath extract with 1 M hydrochloric acid solution Dry the organic layer over Na2SO4 filter evaporate in vacuo to give a residue Distill the residue at reduced pressure

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

Procedure: Combine 2-isopropoxyethanol (1.0 g, 9.6 mmol), N,N-diisopropylethylamine (2.73 g, 21.12 mmol), and dichloromethane (20 mL). Cool in an ice bath. Add dropwise methanesulfonyl chloride (1.43 g, 9.6 mmol). After 2 hours, dilute the reaction mixture with dichloromethane and extract with 1 M hydrochloric acid solution, a saturated solution of sodium bicarbonate, and then brine. Dry the organic layer over Na2SO4, filter, and evaporate in vacuo to give a residue. Distill the residue to give 2-(isopropoxy)ethyl mesylate: bp; 84° C. at 0.1 mm Hg. Cool in an ice bath extract with 1 M hydrochloric acid solution Dry the organic layer over Na2SO4 filter evaporate in vacuo to give a residue Distill the residue

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

Procedure: To a stirred solution of 2-isopropoxyethanol (2.0 mL, 17.37 mmol) in DCM (100 mL) at ambient temperature add methanesulfonyl chloride (1.48 mL, 18.08 mmol). Add triethylamine (2.70 mL, 19.37 mmol) slowly followed by DMAP (catalytic). Continue stirring overnight and concentrate in vacuo. Add diethyl ether and filter. Wash the filtrate with aqueous 1N aqueous HCl, brine, and saturated aqueous NaHCO3. Dry over anhydrous MgSO4 and concentrate in vacuo to give the desired intermediate (2.97 g, 94%). concentrate in vacuo Add diethyl ether and filter Wash the filtrate with aqueous 1N aqueous HCl, brine, and saturated aqueous NaHCO3 Dry over anhydrous MgSO4 concentrate in vacuo

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

Procedure: Combine 1-(t-butoxycarbonyl)-4-(1H-benzimidazol-2-yl)[1,4]diazepane (0.54 g, 1.71 mmol), and sodium hydride (0.87 g, 3.48 mmol) in dimethylformamide (10 mL). After 30 minutes, add 2-(isopropoxy)ethyl mesylate (0.51 g, 5.5 mmol). Heat to 80° C. After 2 hours, cool the reaction mixture to ambient temperature and partition between dichloromethane and a saturated aqueous sodium bicarbonate solution. Separate the layers and extract the organic layer with brine. Dry the organic layer over MgSO4, filter, and evaporate in vacuo to give 1-(t-butoxycarbonyl)-4-(1-(2-(isopropoxy)ethyl)-1H-benzimidazol-2-yl)[1,4]diazepane. After 2 hours cool the reaction mixture to ambient temperature partition between dichloromethane Separate the layers extract the organic layer with brine Dry the organic layer over MgSO4 filter evaporate in vacuo

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

Procedure: Alternately, combine 2-isopropoxyethanol (5.0 g, 48 mmol) and dichloromethane (50 mL). Cool in an ice bath. Add triethylamine (10.7 g, 105 mmol). Add dropwise methanesulfonyl chloride (1.43 g, 9.6 mmol). After 2 hours, dilute the reaction mixture with dichloromethane and extract with 1 M hydrochloric acid solution, a saturated aqueous solution of sodium bicarbonate, and then brine. Dry the organic layer over Na2SO4, filter, and evaporate in vacuo to give a residue. Distill the residue at reduced pressure to give 2-(isopropoxy)ethyl mesylate. Cool in an ice bath extract with 1 M hydrochloric acid solution Dry the organic layer over Na2SO4 filter evaporate in vacuo to give a residue Distill the residue at reduced pressure

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

Procedure: Combine 2-isopropoxyethanol (1.0 g, 9.6 mmol), N,N-diisopropylethylamine (2.73 g, 21.12 mmol), and dichloromethane (20 mL). Cool in an ice bath. Add dropwise methanesulfonyl chloride (1.43 g, 9.6 mmol). After 2 hours, dilute the reaction mixture with dichloromethane and extract with 1 M hydrochloric acid solution, a saturated solution of sodium bicarbonate, and then brine. Dry the organic layer over Na2SO4, filter, and evaporate in vacuo to give a residue. Distill the residue to give 2-(isopropoxy)ethyl mesylate: bp; 84° C. at 0.1 mm Hg. Cool in an ice bath extract with 1 M hydrochloric acid solution Dry the organic layer over Na2SO4 filter evaporate in vacuo to give a residue Distill the residue