chloromethyl(trimethoxy)silane

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

Procedure: 27.5 g (417 mmol) of freshly distilled cyclopentadiene are added dropwise to a solution of 167 ml of n-butyllithium (2.5 molar) (417 mmol) in 250 ml of absolute tetrahydrofuran at RT over a period of one hour. 71.11 g of (chloromethyl)trimethoxysilane are subsequently added dropwise over a period of 30 minutes. The solution becomes warm during this process. After taking off the solvent, the mixture is fractionally distilled under reduced pressure to give 72.2 g of (cyclopentadienylmethyl)trimethoxysilane (yield: 93%). The solution becomes warm during this process the mixture is fractionally distilled under reduced pressure

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Chloromethyltrimethoxysilane (50.0 g., 0.29 mole) and ammonia (98.6 g., 5.80 mole) were charged to a 300 ml. stainless steel pressure vessel. The mixture was heated to 100° C. at 800 psi pressure for 8 hours and then cooled. The mixture was filtered. The crude product was distilled at 60° C. and 0.2 mm Hg pressure to produce N,N-bis-(trimethoxysilylmethyl)amine. The N,N-bis-(trimethoxysilylmethyl)amine so produced (3.0 g., 0.01 mole) was found to be greater than 95% pure by gas chromatography. cooled The mixture was filtered The crude product was distilled at 60° C.

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

Procedure: 27.5 g (417 mmol) of freshly distilled cyclopentadiene are added dropwise to a solution of 167 ml of n-butyllithium (2.5 molar) (417 mmol) in 250 ml of absolute tetrahydrofuran at RT over a period of one hour. 71.11 g of (chloromethyl)trimethoxysilane are subsequently added dropwise over a period of 30 minutes. The solution becomes warm during this process. After taking off the solvent, the mixture is fractionally distilled under reduced pressure to give 72.2 g of (cyclopentadienylmethyl)trimethoxysilane (yield: 93%). The solution becomes warm during this process the mixture is fractionally distilled under reduced pressure

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

Procedure: 27.5 g (417 mmol) of freshly distilled cyclopentadiene are added dropwise to a solution of 167 ml of n-butyllithium (2.5 molar) (417 mmol) in 250 ml of absolute tetrahydrofuran at RT over a period of one hour. 71.11 g of (chloromethyl)trimethoxysilane are subsequently added dropwise over a period of 30 minutes. The solution becomes warm during this process. After taking off the solvent, the mixture is fractionally distilled under reduced pressure to give 72.2 g of (cyclopentadienylmethyl)trimethoxysilane (yield: 93%). The solution becomes warm during this process the mixture is fractionally distilled under reduced pressure

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

Procedure: 340 g (6.3 mol) of sodium methylate (95% strength) are dissolved in portions in 2.5 l of methanol in a laboratory reactor blanketed with nitrogen. During this procedure, the solution heats up to 65° C. Thereafter, 995 g (5.8 mol) of chloromethyltrimethoxysilane are added dropwise over 1.5 h and stirring is effected for a further 30 minutes at the boil. On addition of the silane, sodium chloride is precipitated spontaneously as the salt, but the suspension remains readily stirrable until the end of the metering. The precipitated sodium chloride is filtered off with suction and the methanol is removed under a partial vacuum at 40–50° C. The residue is purified by distillation (97–98° C. at 172 mbar). heats up to 65° C is precipitated spontaneously as the salt The precipitated sodium chloride is filtered off with suction the methanol is removed under a partial vacuum at 40–50° C The residue is purified by distillation (97–98° C. at 172 mbar)

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Chloromethyltrimethoxysilane (50.0 g., 0.29 mole) and ammonia (98.6 g., 5.80 mole) were charged to a 300 ml. stainless steel pressure vessel. The mixture was heated to 100° C. at 800 psi pressure for 8 hours and then cooled. The mixture was filtered. The crude product was distilled at 60° C. and 0.2 mm Hg pressure to produce N,N-bis-(trimethoxysilylmethyl)amine. The N,N-bis-(trimethoxysilylmethyl)amine so produced (3.0 g., 0.01 mole) was found to be greater than 95% pure by gas chromatography. cooled The mixture was filtered The crude product was distilled at 60° C.

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

Procedure: 340 g (6.3 mol) of sodium methylate (95% strength) are dissolved in portions in 2.5 l of methanol in a laboratory reactor blanketed with nitrogen. During this procedure, the solution heats up to 65° C. Thereafter, 995 g (5.8 mol) of chloromethyltrimethoxysilane are added dropwise over 1.5 h and stirring is effected for a further 30 minutes at the boil. On addition of the silane, sodium chloride is precipitated spontaneously as the salt, but the suspension remains readily stirrable until the end of the metering. The precipitated sodium chloride is filtered off with suction and the methanol is removed under a partial vacuum at 40–50° C. The residue is purified by distillation (97–98° C. at 172 mbar). heats up to 65° C is precipitated spontaneously as the salt The precipitated sodium chloride is filtered off with suction the methanol is removed under a partial vacuum at 40–50° C The residue is purified by distillation (97–98° C. at 172 mbar)

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Chloromethyltrimethoxysilane (50.0 g., 0.29 mole) and ammonia (98.6 g., 5.80 mole) were charged to a 300 ml. stainless steel pressure vessel. The mixture was heated to 100° C. at 800 psi pressure for 8 hours and then cooled. The mixture was filtered. The crude product was distilled at 60° C. and 0.2 mm Hg pressure to produce N,N-bis-(trimethoxysilylmethyl)amine. The N,N-bis-(trimethoxysilylmethyl)amine so produced (3.0 g., 0.01 mole) was found to be greater than 95% pure by gas chromatography. cooled The mixture was filtered The crude product was distilled at 60° C.

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of sodium formate (53.6 g, 788 mmol) and high boiler solvent dimethylpropyleneurea (DMPU, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone) (400 mL) was admixed with 100 mL of toluene. To dry the mixture, the toluene was distilled off (47 mbar (head), 26-29° C. (head), 68-90° C. (pot)) and then the vacuum was tightened until only DMPU passed over (1.2 mbar (head), 89° C. (head), 110° C. (pot); about 10 g of DMPU distillate). The remaining mixture was cooled down to 100° C., and (chloromethyl)trimethoxysilane (128 g, 750 mmol) was metered in over 5 minutes, and the resulting mixture was stirred at 100° C. for 30 minutes and at 115° C. for a further 2.5 hours. A reaction check showed complete conversion of the (chloromethyl)trimethoxysilane, and also the desired product (formoxymethyl)trimethoxysilane and the by-products methyl formate, tetramethoxysilane and siloxanes of the silanes formed. The product was distilled at 100° C. temperature (pot) by gradually tightening the vacuum from 15 mbar to 3 mbar (boiling point 59-91° C. (head)). The distillate obtained contained 66.9 g of (formoxymethyl)trimethoxysilane (purity 73.6% (GC area %)); the distillate contained, based on purity, 61.7 g (342 mmol, 46% of theory) of (formoxymethyl)-trimethoxysilane. The solvent, sodium chloride and excess sodium formate remained in the residue. To dry the mixture the toluene was distilled off (47 mbar (head), 26-29° C. (head), 68-90° C. (pot)) passed over (1.2 mbar (head), 89° C. (head), 110° C. (pot); about 10 g of DMPU distillate) was metered in over 5 minutes

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of sodium formate (53.6 g, 788 mmol) and high boiler solvent dimethylpropyleneurea (DMPU, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone) (400 mL) was admixed with 100 mL of toluene. To dry the mixture, the toluene was distilled off (47 mbar (head), 26-29° C. (head), 68-90° C. (pot)) and then the vacuum was tightened until only DMPU passed over (1.2 mbar (head), 89° C. (head), 110° C. (pot); about 10 g of DMPU distillate). The remaining mixture was cooled down to 100° C., and (chloromethyl)trimethoxysilane (128 g, 750 mmol) was metered in over 5 minutes, and the resulting mixture was stirred at 100° C. for 30 minutes and at 115° C. for a further 2.5 hours. A reaction check showed complete conversion of the (chloromethyl)trimethoxysilane, and also the desired product (formoxymethyl)trimethoxysilane and the by-products methyl formate, tetramethoxysilane and siloxanes of the silanes formed. The product was distilled at 100° C. temperature (pot) by gradually tightening the vacuum from 15 mbar to 3 mbar (boiling point 59-91° C. (head)). The distillate obtained contained 66.9 g of (formoxymethyl)trimethoxysilane (purity 73.6% (GC area %)); the distillate contained, based on purity, 61.7 g (342 mmol, 46% of theory) of (formoxymethyl)-trimethoxysilane. The solvent, sodium chloride and excess sodium formate remained in the residue. To dry the mixture the toluene was distilled off (47 mbar (head), 26-29° C. (head), 68-90° C. (pot)) passed over (1.2 mbar (head), 89° C. (head), 110° C. (pot); about 10 g of DMPU distillate) was metered in over 5 minutes

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of sodium formate (53.6 g, 788 mmol) and high boiler solvent dimethylpropyleneurea (DMPU, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone) (400 mL) was admixed with 100 mL of toluene. To dry the mixture, the toluene was distilled off (47 mbar (head), 26-29° C. (head), 68-90° C. (pot)) and then the vacuum was tightened until only DMPU passed over (1.2 mbar (head), 89° C. (head), 110° C. (pot); about 10 g of DMPU distillate). The remaining mixture was cooled down to 100° C., and (chloromethyl)trimethoxysilane (128 g, 750 mmol) was metered in over 5 minutes, and the resulting mixture was stirred at 100° C. for 30 minutes and at 115° C. for a further 2.5 hours. A reaction check showed complete conversion of the (chloromethyl)trimethoxysilane, and also the desired product (formoxymethyl)trimethoxysilane and the by-products methyl formate, tetramethoxysilane and siloxanes of the silanes formed. The product was distilled at 100° C. temperature (pot) by gradually tightening the vacuum from 15 mbar to 3 mbar (boiling point 59-91° C. (head)). The distillate obtained contained 66.9 g of (formoxymethyl)trimethoxysilane (purity 73.6% (GC area %)); the distillate contained, based on purity, 61.7 g (342 mmol, 46% of theory) of (formoxymethyl)-trimethoxysilane. The solvent, sodium chloride and excess sodium formate remained in the residue. To dry the mixture the toluene was distilled off (47 mbar (head), 26-29° C. (head), 68-90° C. (pot)) passed over (1.2 mbar (head), 89° C. (head), 110° C. (pot); about 10 g of DMPU distillate) was metered in over 5 minutes

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Chloromethyltrimethoxysilane (50.0 g., 0.29 mole) and ammonia (98.6 g., 5.80 mole) were charged to a 300 ml. stainless steel pressure vessel. The mixture was heated to 100° C. at 800 psi pressure for 8 hours and then cooled. The mixture was filtered. The crude product was distilled at 60° C. and 0.2 mm Hg pressure to produce N,N-bis-(trimethoxysilylmethyl)amine. The N,N-bis-(trimethoxysilylmethyl)amine so produced (3.0 g., 0.01 mole) was found to be greater than 95% pure by gas chromatography. cooled The mixture was filtered The crude product was distilled at 60° C.