N-Boc-pyrrolidine → (R)-tert-butyl 2-(2-oxoindolin-4-yl)pyrrolidine-1-carboxylate

HRID 2190072ノート

反応式

HRID 2190072 の反応式
C([Li])(CC)C.[N:6]1([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:10][CH2:9][CH2:8][CH2:7]1.Br[C:19]1[CH:27]=[CH:26][CH:25]=[C:24]2[C:20]=1[CH2:21][C:22](=[O:28])[NH:23]2.F[B-](F)(F)F.C(P(C(C)(C)C)C(C)(C)C)(C)(C)C>CC(OC)(C)C.[Cl-].[Zn+2].[Cl-].C([O-])(=O)C.[Pd+2].C([O-])(=O)C.CCOC(C)=O>[O:28]=[C:22]1[CH2:21][C:20]2[C:24](=[CH:25][CH:26]=[CH:27][C:19]=2[C@H:7]2[CH2:8][CH2:9][CH2:10][N:6]2[C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[NH:23]1

参加物

9

反応物 4

HCID 643455N-Boc-pyrrolidineHCID 27631904-bromo-2,3-dihydro-1H-indol-2-oneHCID 44558591Tri-t-butylphosphine fluoroborateHCID 178418400CID 53628100

生成物 1

HCID 69812735(R)-tert-butyl 2-(2-oxoindolin-4-yl)pyrrolidine-1-carboxylate収率 27%

試薬・触媒・溶媒 4

HCID 167845palladium(II) acetate触媒HCID 3007855Zincchloride触媒HCID 8857Ethyl Acetate溶媒HCID 15413tert-Butyl methyl ether溶媒

反応条件

温度
-78 °C

実験手順

sec-Butyl lithium (25.3 mL, 35.4 mmol) was added into a solution of tert-butyl 1-pyrrolidinecarboxylate (6.2 mL, 35.4 mmol) and (−)-spartiene (8.29 g, 35.4 mmol) in MTBE (100 mL) at −78° C. The mixture was stirred for 1 hour at −78° C. Zinc chloride solution (35.4 mL, 35.4 mmol) was added, and the reaction was stirred for 15 minutes at −78° C. The reaction was allowed to warm up to room temperature. 4-Bromoindolin-2-one (5.00 g, 23.6 mmol), palladium (II) acetate (0.53 g, 2.4 mmol) and tri-tert-butylphosphine tetrafluoroborate (0.68 g, 2.4 mmol) was added into the reaction mixture. The reaction was stirred for 12 hours at room temperature. The reaction mixture was poured into EtOAc (200 mL), and the suspension was filtered with a pad of celite. The filtrate was concentrated, and the residue was purified by flash chromatography (silica gel eluted with 4:1 hexanes:ethyl acetate) to give (R)-tert-butyl 2-(2-oxoindolin-4-yl)pyrrolidine-1-carboxylate (1.9 g, 27%) as a solid. 1H NMR (CDCl3, 400 MHz) δ 7.80 (s, 1H), 7.10-7.20 (m, 1H), 6.75-6.82 (m, 1H), 6.62-6.78 (m, 1H), 4.65-4.93 (m, 1H), 3.34-3.73 (m, 4H), 2.20-2.40 (m, 1H), 1.84-2.00 (m, 2H), 1.68-1.83 (m, 1H), 1.45 (2, 4H), 1.14 (s, 5H). MS (APCI+) [M+H]+ 303.

後処理

  1. stirringthe reaction was stirred for 15 minutes at −78° C
  2. temperatureto warm up to room temperature
  3. stirringThe reaction was stirred for 12 hours at room temperature
  4. filtrationthe suspension was filtered with a pad of celite
  5. concentrationThe filtrate was concentrated
  6. customthe residue was purified by flash chromatography (silica gel eluted with 4:1 hexanes:ethyl acetate)

出典と根拠

ORDレコード
ord-b6ff8abee4ba4cfb81ba31626642f308
出典データセット
uspto-grants-2012_12
特許番号
US08324221B2

反応ノート

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