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

HRID 352588Notes

Reaction equation

HRID 352588 reaction equation
[C:1]([Si:5]([CH3:25])([CH3:24])[O:6][CH:7]([CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([F:23])[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].C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[CH3:36][O:37][C:38](=[O:49])[C:39]1[CH:44]=[CH:43][C:42]([CH2:45][CH2:46][CH2:47]Br)=[CH:41][CH:40]=1.CCOC(C)=O>C(Cl)Cl.CO>[CH3:36][O:37][C:38](=[O:49])[C:39]1[CH:44]=[CH:43][C:42]([CH2:45][CH2:46][CH2:47][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][CH:20]=[C:19]([F:23])[CH:18]=2)=[CH:41][CH:40]=1

Participants

7

Reactant 4

HCID 8857Ethyl Acetate3×HCID 2724254Sodium bis(trimethylsilyl)amideHCID 10801120Methyl 4-(3-bromopropyl)benzoateHCID 129700955-[3-(Tert-butyldimethyl-silanyloxy)-4-(3-fluoro-phenyl)-butyl]-pyrrolidin-2-one

Product 1

HCID 129701024-(3-{2-[3-(Tert-butyl-dimethyl-silanyloxy)-4-(3-fluoro-phenyl)-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl esterYield 72.9%

Reagents, catalysts & solvents 2

HCID 887MethanolSolvent2×HCID 6344DichloromethaneSolvent2×

Procedure

Analogous to the procedure described in Example 1A, Step D, 5-[3-(tert-butyl-dimethyl-silanyloxy)-4-(3-fluoro-phenyl)-butyl]-pyrrolidin-2-one (254.7 mg, 0.697 mmol) was alkylated with NaHMDS (1M in THF, 0.84 mL, 0.84 mmol) and 4-(3-bromo-propyl)-benzoic acid methyl ester (200 mg, 0.778 mmol). Purificaton by medium pressure chromatography (5:1 hexanes:EtOAc to 1:1 hexanes:EtOAc to EtOAc to 1% MeOH in CH2Cl2 to 5% MeOH in CH2Cl2) provided 4-(3-{2-[3-(tert-butyl-dimethyl-silanyloxy)-4-(3-fluoro-phenyl)-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester (275.3 mg). 1H NMR (CDCl3) (selected peaks) δ7.94 (d, 2H), 7.23 (m, 3H), 6.87 (m, 3H), 3.88 (s, 3H), 3.86 (m, 1H), 3.63 (m, 1H), 3.50 (m, 1H), 2.94 (m, 1H), 0.84 (s, 9H).

Sources & evidence

ORD record
ord-3ef7aa21cb6c4e7da3473671b950df2b
Source dataset
uspto-grants-2004_06
Patent number
US06747054B2

Reaction notes

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