Triethylamine → methyl 2-((2S,4R)-2-(azidomethyl)-4-(5-cyclopropylpyrazin-2-yloxy)-pyrrolidin-1-yl)acetate

HRID 1184617ノート

反応式

HRID 1184617 の反応式
[N:1]([CH2:4][C@H:5]1[NH:9][CH2:8][C@H:7]([O:10][C:11]2[CH:16]=[N:15][C:14]([CH:17]3[CH2:19][CH2:18]3)=[CH:13][N:12]=2)[CH2:6]1)=[N+:2]=[N-:3].C(N(CC)CC)C.Br[CH2:28][C:29]([O:31][CH3:32])=[O:30]>CO>[N:1]([CH2:4][C@@H:5]1[CH2:6][C@@H:7]([O:10][C:11]2[CH:16]=[N:15][C:14]([CH:17]3[CH2:18][CH2:19]3)=[CH:13][N:12]=2)[CH2:8][N:9]1[CH2:28][C:29]([O:31][CH3:32])=[O:30])=[N+:2]=[N-:3]

参加物

5

反応物 3

HCID 8471TriethylamineHCID 60984Methyl bromoacetateHCID 866805342-((3R,5S)-5-(azidomethyl)pyrrolidin-3-yloxy)-5-cyclopropylpyrazine

生成物 1

HCID 86680535methyl 2-((2S,4R)-2-(azidomethyl)-4-(5-cyclopropylpyrazin-2-yloxy)-pyrrolidin-1-yl)acetate収率 54.8%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

反応条件

温度
65 °C

実験手順

To a solution of the product from Example 201A (290 mg, 1.114 mmol) in triethylamine (388 μl, 2.79 mmol) and methanol (0.3 mL) was added methyl bromoacetate (175 μL, 1.894 mmol), and the resulting mixture was stirred at 65° C. for 18 hours. The cooled mixture was concentrated in vacuo and partitioned between 1 N sodium bicarbonate and ethyl acetate. The organic extract was dried over Na2SO4, filtered and concentrated. The crude product was purified by chromatography on a 12 g silica gel column eluting with 5% ethyl acetate/hexanes for 3 minutes then a gradient to 100% ethyl acetate over 20 minutes to give the title compound as an oil (203 mg, 54.8%). 1H NMR (500 MHz, pyridine-d5) δ ppm 6.74 (s, 1H), 4.63 (s, 1H), 4.36 (d, J=61.9 Hz, 1H), 4.08 (dt, J=14.2, 6.0 Hz, 1H), 3.81 (dd, J=42.1, 9.2 Hz, 1H), 3.62 (dd, J=11.3, 4.3 Hz, 1H), 3.46-3.27 (m, 1H), 2.23 (dd, J=21.4, 10.3 Hz, 1H), 2.17-2.04 (m, 1H), 1.49 (d, J=8.4 Hz, 11H); MS (ESI) m/z 333 (M+H)+.

後処理

  1. concentrationThe cooled mixture was concentrated in vacuo
  2. custompartitioned between 1 N sodium bicarbonate and ethyl acetate
  3. extractionThe organic extract
  4. dry with materialwas dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was purified by chromatography on a 12 g silica gel column
  8. washeluting with 5% ethyl acetate/hexanes for 3 minutes

出典と根拠

ORDレコード
ord-d51cd7adca6a409e88fe7556f461c9eb
出典データセット
uspto-grants-2014_03
特許番号
US08669255B2

反応ノート

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