2-[5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester → 2-[5-[4-(2-oxo-1,2-dihydro-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 71727

反応式

HRID 71727 の反応式
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[N:14]([CH2:38][O:39][CH2:40][CH2:41][Si:42]([CH3:45])([CH3:44])[CH3:43])[C:15]([C:18]2[CH:23]=[CH:22][C:21]([C:24]3[CH:29]=[CH:28][N:27]=[C:26]([O:30]CC4C=CC=CC=4)[CH:25]=3)=[CH:20][CH:19]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]>C(O)C.[Pd]>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[N:14]([CH2:38][O:39][CH2:40][CH2:41][Si:42]([CH3:45])([CH3:44])[CH3:43])[C:15]([C:18]2[CH:23]=[CH:22][C:21]([C:24]3[CH:29]=[CH:28][NH:27][C:26](=[O:30])[CH:25]=3)=[CH:20][CH:19]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

4

反応物 1

HCID 666201842-[5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

生成物 1

HCID 666201862-[5-[4-(2-oxo-1,2-dihydro-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester収率 71.4%

試薬・触媒・溶媒 2

HCID 23938Palladium触媒HCID 702Ethanol溶媒

実験手順

To a solution of 2-{5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (0.530 g) in DMF (5.0 mL) at 0° C. was added 60% sodium hydride (0.047 g). After stirring for 5 minutes, 2-(trimethylsilyl)ethoxylmethyl chloride was added and reaction mixture stirred for 2 hours. Saturated ammonium chloride was added and mixture was extracted with ethyl acetate (2×). Organic layer was washed with 5% lithium chloride solution (2×), brine and dried (MgSO4). Concentrated and purified by flash column chromatography (silica gel, 20 to 80% ethyl acetate/hexanes) to give 2-[5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (0.495 g). LCMS-ESI+: calc'd for C36H47N4O4Si: 627.87 (M+H+). Found: 627.1 (M+H+). A mixture of 2-[5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (0.495 g) and 10% Pd/C (0.023 g) in ethanol (5.5 mL) was stirred under hydrogen atmosphere for 1 hour. Reaction mixture was filtered through a pad of Celite, which was washed with methanol. The filtrate was concentrated and purified by flash column chromatography (silica gel, 0 to 10% methanol/ethyl acetate) to give 2-[5-[4-(2-Oxo-1,2-dihydro-pyridin-4-yl)-phenyl]-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (0.3027 g): LCMS-ESI+: calc'd for C29H41N4O4Si: 537.47 (M+H+). Found: 537.0 (M+H+).

後処理

  1. customReaction mixture
  2. filtrationwas filtered through a pad of Celite, which
  3. washwas washed with methanol
  4. concentrationThe filtrate was concentrated
  5. custompurified by flash column chromatography (silica gel, 0 to 10% methanol/ethyl acetate)

出典と根拠

ORDレコード
ord-ff72397dae5849ee901e475130edb67a
出典データセット
uspto-grants-2014_09
特許番号
US08822430B2

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