4,4'-(Pentamethylenedioxy)-bis-(nitrobenzene) → 1,5-Bis(p-aminophenoxy)pentane

HRID 1372552

反応式

HRID 1372552 の反応式
[N+:1]([C:4]1[CH:25]=[CH:24][C:7]([O:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][O:14][C:15]2[CH:20]=[CH:19][C:18]([N+:21]([O-])=O)=[CH:17][CH:16]=2)=[CH:6][CH:5]=1)([O-])=O.[H][H]>O1CCCC1.[Pd]>[NH2:21][C:18]1[CH:17]=[CH:16][C:15]([O:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][O:8][C:7]2[CH:6]=[CH:5][C:4]([NH2:1])=[CH:25][CH:24]=2)=[CH:20][CH:19]=1

参加物

5

反応物 2

HCID 5505304,4'-(Pentamethylenedioxy)-bis-(nitrobenzene)HCID 178418361HCID 178418361、化合物

生成物 1

HCID 141731,5-Bis(p-aminophenoxy)pentane収率 90%

試薬・触媒・溶媒 2

HCID 23938Palladium触媒HCID 8028Tetrahydrofuran溶媒

実験手順

A mixture of 1,5-bis(4-nitrophenoxy)pentane (32.7 grams, 94.4 mmol; prepared as described in Part A of this Example) and Pd/C 10% (1.00 gram, obtained from Aldrich Chemical Co.) was stirred for 20 hours in tetrahydrofuran (400 milliliters) under 200 pounds per square inch of hydrogen gas. The mixture was then filtered over CELITE, and the solvent was removed by evaporation under reduced pressure. The resulting crude solid was recrystallized from ethanol to afford pure 1,5-bis(4-aminophenoxy)pentane (24.4 grams, 85.1 mmol, 90 percent yield) as small colorless crystals: mp 78–79° C.; IR (KBr) 3433, 3353, 3217, 2949, 2868, 1856, 1632, 1511, 1473, 1396, 1228, 1031, 1002, 825, 517 cm−1; 1H NMR (300 MHz, CDCl3) δ 6.76 (d, 4H, 3J=8.8 Hz), 6.64 (d, 4H, 3J=8.8 Hz), 3.92 (td, 4H, 3J=6.4 Hz, 4J=1.4 Hz), 3.40 (s, 4H), 1.82 (q, 4H, 3J=6.8 Hz), 1.62 (q, 2H, 3J=6.8 Hz); 13C NMR (75 MHz, CDCl3) δ 151.31, 140.06, 116.51, 115.78, 68.58, 29.32, 22.83; MS (FAB, 3-nitrobenzyl alcohol) m/e 286.7; Anal. Calcd for C17H22N2O2: C, 71.30; H, 7.74; N, 9.78. Found: C, 71.11; H, 8.22; N, 9.85.

後処理

  1. customprepared
  2. filtrationThe mixture was then filtered over CELITE
  3. customthe solvent was removed by evaporation under reduced pressure
  4. customThe resulting crude solid was recrystallized from ethanol

出典と根拠

ORDレコード
ord-2efb66e2532f45aa942bae737a13944e
出典データセット
uspto-grants-2007_01
特許番号
US07157601B2

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