Boron trifluoride etherate → HCID 86701035, compound
Reaction equation
[Si:1]([O:8][CH2:9][CH2:10][C:11]#[N:12])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[CH2:13]([Mg]Br)[CH3:14].B(F)(F)F.CCOCC>CCOCC.C([O-])(C)C.C([O-])(C)C.C([O-])(C)C.C([O-])(C)C.[Ti+4]>[Si:1]([O:8][CH2:9][CH2:10][C:11]1([NH2:12])[CH2:14][CH2:13]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]Participants
Procedure
To a solution of 3-(tert-butyldimethylsilyloxy)propanenitrile (11.1 g, 60 mmol) in Et2O (400 mL) was added titanium tetraisopropanolate (28.9 g, 102 mmol) under N2 atmosphere. Ethylmagnesium bromide (3-M in Et2O, 50 mL) was slowly added drop-wise at 0° C. The mixture was stirred at rt for 1 hr. Boron trifluoride etherate (17.0 g, 120 mmol) was slowly added at 0° C. The mixture was stirred at rt for 1 hr. The mixture was quenched with 10% aq. NaOH (300 mL) and then extracted with DCM (3×). The combined organic layer was dried over Na2SO4 and concentrated. The residue was purified by silica gel column chromatography (gradient elution 5-50% EtOAc/petroleum ether) to afford 1-(2-(tert-butyldim ethylsilyloxy)ethyl)cyclopropanamine (3.9 g, 30%) as a colorless oil. ESI-MS (EI+, m/z): 216.2 [M+H]+.
Workup
- customat 0° C
- stirringThe mixture was stirred at rt for 1 hr
- customThe mixture was quenched with 10% aq. NaOH (300 mL)
- extractionextracted with DCM (3×)
- dry with materialThe combined organic layer was dried over Na2SO4
- concentrationconcentrated
- customThe residue was purified by silica gel column chromatography (gradient elution 5-50% EtOAc/petroleum ether)
Sources & evidence
- ORD record
- ord-daf87c02bc5442b0988903266864819e
- Source dataset
- uspto-grants-2015_01
- Patent number
- US08933232B2
Reaction notes
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