Methyl iodide → 4-(2-bromo-5-fluorobenzyl)-6-methyl-3-(methylthio)-1,2,4-triazin-5(4H)-one

HRID 240280

反応式

HRID 240280 の反応式
[Br:1][C:2]1[CH:17]=[CH:16][C:15]([F:18])=[CH:14][C:3]=1[CH2:4][N:5]1[C:10](=[O:11])[C:9]([CH3:12])=[N:8][NH:7][C:6]1=[S:13].[OH-].[Na+].[CH3:21]I>C(O)C.O>[Br:1][C:2]1[CH:17]=[CH:16][C:15]([F:18])=[CH:14][C:3]=1[CH2:4][N:5]1[C:10](=[O:11])[C:9]([CH3:12])=[N:8][N:7]=[C:6]1[S:13][CH3:21]

参加物

6

反応物 3

HCID 6328Methyl iodideHCID 14798Sodium HydroxideHCID 58328543HCID 58328543、化合物

生成物 1

HCID 583285304-(2-bromo-5-fluorobenzyl)-6-methyl-3-(methylthio)-1,2,4-triazin-5(4H)-one

試薬・触媒・溶媒 2

HCID 702Ethanol溶媒HCID 962Water溶媒

実験手順

To a suspension of 4-(2-bromo-5-fluorobenzyl)-6-methyl-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (16, 914 mg, 2.77 mmol) in ethanol (15 mL) was added NaOH (111 mg, 2.77 mmol) followed by MeI (787 mg, 5.54 mmol). The mixture was stirred at RT for 10 min to produce a clear yellow solution. The reaction was diluted with water (100 mL), and extracted with EtOAc (30 mL×2). The extracts were washed with brine, dried over MgSO4 and concentrated to give the crude product. This was purified by silica gel column, and eluted with 20-25% ethyl acetate in petroleum ether to give 4-(2-bromo-5-fluorobenzyl)-6-methyl-3-(methylthio)-1,2,4-triazin-5(4H)-one (17). 1H NMR (400 MHz, DMSO, ppm): δ 7.73 (m, 1H), 7.16 (br, 1H), 7.05 (d, 1H), 5.09 (s, 2H), 2.56 (s, 3H), 2.32 (s, 3H). MS: m/z, 344 (100%, M+1), 346 (100%).

後処理

  1. customto produce a clear yellow solution
  2. extractionextracted with EtOAc (30 mL×2)
  3. washThe extracts were washed with brine
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customto give the crude product
  7. customThis was purified by silica gel column
  8. washeluted with 20-25% ethyl acetate in petroleum ether

出典と根拠

ORDレコード
ord-40c9a72703134179a5183d841b46c083
出典データセット
uspto-grants-2014_02
特許番号
US08648073B2

関連ノート

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