Sodium → Methyl 4-(3-benzyloxy-6-nitroindazol-1-ylmethyl)-3-methoxybenzoate

HRID 1086580ノート

反応式

HRID 1086580 の反応式
[OH:1][C:2]1[C:10]2[C:5](=[CH:6][C:7]([N+:11]([O-:13])=[O:12])=[CH:8][CH:9]=2)[N:4]([CH2:14][C:15]2[CH:24]=[CH:23][C:18]([C:19]([O:21][CH3:22])=[O:20])=[CH:17][C:16]=2[O:25][CH3:26])[N:3]=1.[Na]>CO>[CH2:2]([O:1][C:2]1[C:10]2[C:5](=[CH:6][C:7]([N+:11]([O-:13])=[O:12])=[CH:8][CH:9]=2)[N:4]([CH2:14][C:15]2[CH:24]=[CH:23][C:18]([C:19]([O:21][CH3:22])=[O:20])=[CH:17][C:16]=2[O:25][CH3:26])[N:3]=1)[C:10]1[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1

参加物

4

反応物 2

HCID 5360545SodiumHCID 178497911HCID 178497911、化合物

生成物 1

HCID 23365833Methyl 4-(3-benzyloxy-6-nitroindazol-1-ylmethyl)-3-methoxybenzoate収率 120.8%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

反応条件

温度
0 °C

実験手順

Methyl 4-(3-hydroxy-6-nitroindazol-1-ylmethyl)-3-methoxybenzoate (T) (35.7 g.) was added to a mixture of sodium (2.3 g.) and methanol (200 ml.). The mixture was stirred for 18 hours, and evaporated. The residue was dissolved in N,N-dimethylformamide (100 ml.), cooled to 0° C., and benzyl bromide (15.5 ml.) added. After 18 hours at ambient temperature, ethyl acetate and 1N sodium hydroxide solution were added. The precipitate was isolated by filtration, washed with ether, and chromatographed by HPLC on silica gel, eluting with dichloromethane, to give methyl 4-(3-benzyloxy-6-nitroindazol-1-ylmethyl)-3-methoxybenzoate (CC) (27 g., 60%) as a solid; NMR (250 MHz, DMSO-d6): 3.84(s,3H, OMe); 3.86(s,3H, OMe); 5.38(s,2H, NCH2); 5.65(s,2H, OCH2); 6.95(d,1H); 7.36 (m,3H); 7.46(m,5H); 7.86(m,2H); 8.66(s,1H).

後処理

  1. customevaporated
  2. dissolutionThe residue was dissolved in N,N-dimethylformamide (100 ml.)
  3. additionbenzyl bromide (15.5 ml.) added
  4. waitAfter 18 hours at ambient temperature
  5. additionethyl acetate and 1N sodium hydroxide solution were added
  6. customThe precipitate was isolated by filtration
  7. washwashed with ether
  8. customchromatographed by HPLC on silica gel
  9. washeluting with dichloromethane

出典と根拠

ORDレコード
ord-4130dd19541f468f9fca946f1e621a33
出典データセット
uspto-grants-1991_07
特許番号
US05030643

反応ノート

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