Methyl 4-(3-bromopropyl)benzoate → 4-(3-{2-[3-(Tert-butyl-dimethyl-silanyloxy)-4-(4-fluoro-phenyl)-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester

HRID 1267447Notes

Reaction equation

HRID 1267447 reaction equation
[C:1]([Si:5]([CH3:25])([CH3:24])[O:6][CH:7]([CH2:16][C:17]1[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=1)[CH2:8][CH2:9][CH:10]1[NH:14][C:13](=[O:15])[CH2:12][CH2:11]1)([CH3:4])([CH3:3])[CH3:2].[CH3:26][O:27][C:28](=[O:39])[C:29]1[CH:34]=[CH:33][C:32]([CH2:35][CH2:36][CH2:37]Br)=[CH:31][CH:30]=1>>[CH3:26][O:27][C:28](=[O:39])[C:29]1[CH:34]=[CH:33][C:32]([CH2:35][CH2:36][CH2:37][N:14]2[C:13](=[O:15])[CH2:12][CH2:11][CH:10]2[CH2:9][CH2:8][CH:7]([O:6][Si:5]([C:1]([CH3:4])([CH3:3])[CH3:2])([CH3:25])[CH3:24])[CH2:16][C:17]2[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=2)=[CH:31][CH:30]=1

Participants

3

Reactant 2

HCID 10801120Methyl 4-(3-bromopropyl)benzoateHCID 227125205-[3-(Tert-butyl-dimethyl-silanyloxy)4-(4-fluoro-phenyl)-butyl]-pyrrolidin-2-one

Product 1

HCID 692689634-(3-{2-[3-(Tert-butyl-dimethyl-silanyloxy)-4-(4-fluoro-phenyl)-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl esterYield 57%

Procedure

Analogous to the procedure described for Example 1A, Step D, 5-[3-(tert-butyl-dimethyl-silanyloxy)-4-(4-fluoro-phenyl)-butyl]-pyrrolidin-2-one (296 mg, 0.809 mmol) was alkylated with 4-(3-bromo-propyl)-benzoic acid methyl ester (276 mg, 1.07 mmol) over 72 h. Purification by medium pressure chromatography (1:1 hexanes:EtOAc) provided 4-(3-{2-[3-(tert-butyl-dimethyl-silanyloxy)-4-(4-fluoro-phenyl)-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester (250 mg). 1H NMR (CDCl3) (selected peaks) δ7.92 (d, 2H), 7.21 (d, 2H), 7.05 (m, 2H), 6.92 (m, 2H), 3.86 (s, 3H), 3.76 (m, 1H), 3.62 (m, 1H), 3.45 (m, 1H), 0.81 (s, 9H).

Workup

  1. customPurification by medium pressure chromatography (1:1 hexanes:EtOAc)

Sources & evidence

ORD record
ord-78579eb221bf4402a52318e5fee5ddc9
Source dataset
uspto-grants-2003_04
Patent number
US06552067B2

Reaction notes

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