Triethylamine → [(R)-1-(5-bromo-2-fluoro-phenyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-(4-methoxy-benzyl)-amine

HRID 1929500Notes

Reaction equation

HRID 1929500 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:22])=[C:6]([C@:8]([NH:12][CH2:13][C:14]2[CH:19]=[CH:18][C:17]([O:20][CH3:21])=[CH:16][CH:15]=2)([CH3:11])[CH2:9][OH:10])[CH:7]=1.C(N(CC)CC)C.[C:30]([Si:34]([CH3:37])([CH3:36])Cl)([CH3:33])([CH3:32])[CH3:31]>ClCCl.CN(C)C1C=CN=CC=1>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:22])=[C:6]([C@:8]([NH:12][CH2:13][C:14]2[CH:15]=[CH:16][C:17]([O:20][CH3:21])=[CH:18][CH:19]=2)([CH3:11])[CH2:9][O:10][Si:34]([C:30]([CH3:33])([CH3:32])[CH3:31])([CH3:37])[CH3:36])[CH:7]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 28928tert-Butyldimethylsilyl chlorideHCID 66931632(R)-2-(5-bromo-2-fluoro-phenyl)-2-(4-methoxy-benzylamino)-propan-1-ol

Product 1

HCID 66931457[(R)-1-(5-bromo-2-fluoro-phenyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-(4-methoxy-benzyl)-amine

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of (R)-2-(5-bromo-2-fluoro-phenyl)-2-(4-methoxy-benzylamino)-propan-1-ol (6.95 g, 18.9 mmol) in dichloromethane (170 ml) was treated at room temperature with triethylamine (5.78 ml, 41.5 mmol), 4-dimethylaminopyridine (1.15 g, 9.43 mmol), and tert-butyldimethylchlorosilane (1.15 g, 37.7 mmol). After 16 hours at room temperature the reaction mixture was consecutively extracted with saturated sodium hydrogen-carbonate solution (100 ml), water (100 ml), and brine (100 ml). The aqueous layers were re-extracted with dichloromethane (100 ml). The combined organic layers were dried over sodium sulfate and evaporated at reduced pressure. After chromatography on Silicycle-Si-amine column using heptane as the eluent, [(R)-1-(5-bromo-2-fluoro-phenyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-(4-methoxy-benzyl)-amine was obtained as a colorless oil (8.0 g, 88% of theory). Mass (calculated) C23H33BrFNO2Si [482.51]; (found) [M+H]+=482, [M+2-H]+=484.

Workup

  1. extractionAfter 16 hours at room temperature the reaction mixture was consecutively extracted with saturated sodium hydrogen-carbonate solution (100 ml), water (100 ml), and brine (100 ml)
  2. extractionThe aqueous layers were re-extracted with dichloromethane (100 ml)
  3. dry with materialThe combined organic layers were dried over sodium sulfate
  4. customevaporated at reduced pressure

Sources & evidence

ORD record
ord-a087af1195094c109d6098830c4b563a
Source dataset
uspto-grants-2012_05
Patent number
US08188079B2

Reaction notes

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