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 458977Notes

Reaction equation

HRID 458977 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-dc354cbca6f74166a0cfa74d88daaffa
Source dataset
uspto-grants-2007_03
Patent number
US07192979B2

Reaction notes

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