tert-Butyl piperazine-1-carboxylate → HCID 59441856、化合物

HRID 1014254ノート

反応式

HRID 1014254 の反応式
Br[C:2]1[CH:7]=[C:6]([O:8][CH3:9])[C:5]([N+:10]([O-:12])=[O:11])=[CH:4][C:3]=1[CH3:13].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.[N:56]1([C:62]([O:64][C:65]([CH3:68])([CH3:67])[CH3:66])=[O:63])[CH2:61][CH2:60][NH:59][CH2:58][CH2:57]1>O1CCOCC1>[CH3:13][C:3]1[CH:4]=[C:5]([N+:10]([O-:12])=[O:11])[C:6]([O:8][CH3:9])=[CH:7][C:2]=1[N:59]1[CH2:58][CH2:57][N:56]([C:62]([O:64][C:65]([CH3:68])([CH3:67])[CH3:66])=[O:63])[CH2:61][CH2:60]1

参加物

5

反応物 3

HCID 143452tert-Butyl piperazine-1-carboxylateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 59441753HCID 59441753、化合物

生成物 1

HCID 59441856HCID 59441856、化合物収率 38%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

反応条件

温度
60 °C

実験手順

to a stirred solution of 1-bromo-2-methyl-5-(methyloxy)-4-nitrobenzene (9 g, 36.6 mmol) in 180 mL of Dioxane was added Pd2(dba)2 (2.14 g, 2.34 mmol), XANTPHOS (2.12 g, 3.65 mmol), cesuim carbonte (50 g, 153.6 mmol) and 1,1-dimethylethyl 1-piperazinecarboxylate (13.6 g, 73.15 mmol). The resulting slurry was warmed to 60° C. for 24 hours. The dioxane was removed under reduced pressure and the crude mixture was taken up in ether and filtered to remove cesium carbonate. The ether was, washed with water, dried (Na2SO4), filtered, and rotovaped down. The crude product was purified by flash chromatography to give 1,1-dimethylethyl 4-[2-methyl-5-(methyloxy)-4-nitrophenyl]-1-piperazinecarboxylate (4.83 g, 13.75 mmol, 38%). 1H NMR (400 MHz, CDCl3) δ ppm 7.81 (s, 1 H), 6.56 (s, 1 H), 3.92 (s, 3 H), 3.52-3.63 (m, 4 H), 2.88-2.99 (m, 4 H), 2.25 (s, 3 H), 1.47 (s, 9 H).

後処理

  1. customThe dioxane was removed under reduced pressure
  2. filtrationfiltered
  3. customto remove cesium carbonate
  4. washwashed with water
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. customThe crude product was purified by flash chromatography

出典と根拠

ORDレコード
ord-9339f2b5f8064d9b9e5581a8ea712246
出典データセット
uspto-grants-2011_07
特許番号
US07981903B2

反応ノート

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