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

HRID 8417

반응식

HRID 8417 반응식
[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

참가 물질

5

반응물 2

HCID 5505304,4'-(Pentamethylenedioxy)-bis-(nitrobenzene)HCID 178418361HCID 178418361, 화합물

생성물 1

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

시약·촉매·용매 2

HCID 23938Palladium촉매HCID 8028Tetrahydrofuran용매

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-a7f7ae6390344917803d662834d38ff3
출처 데이터셋
uspto-grants-2006_08
특허 번호
US07087752B2

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