4-Benzyloxy-2-nitroaniline → 4-(benzyloxy)-N-((2-(methylthio)benzo[d]thiazol-6-yl)methyl)-2-nitroaniline

HRID 1848159노트

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HRID 1848159 반응식
[CH2:1]([O:8][C:9]1[CH:15]=[CH:14][C:12]([NH2:13])=[C:11]([N+:16]([O-:18])=[O:17])[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].[CH3:33][S:34][C:35]1[S:36][C:37]2[CH:43]=[C:42]([CH:44]=O)[CH:41]=[CH:40][C:38]=2[N:39]=1>C(O)(C(F)(F)F)=O.C(Cl)Cl>[CH2:1]([O:8][C:9]1[CH:15]=[CH:14][C:12]([NH:13][CH2:44][C:42]2[CH:41]=[CH:40][C:38]3[N:39]=[C:35]([S:34][CH3:33])[S:36][C:37]=3[CH:43]=2)=[C:11]([N+:16]([O-:18])=[O:17])[CH:10]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

6

반응물 3

HCID 2614974-Benzyloxy-2-nitroanilineHCID 5049666Sodium triacetoxyborohydrideHCID 547753816-Benzothiazolecarboxaldehyde, 2-(methylthio)-

생성물 1

HCID 866811284-(benzyloxy)-N-((2-(methylthio)benzo[d]thiazol-6-yl)methyl)-2-nitroaniline수율 64.1%

시약·촉매·용매 2

HCID 6344Dichloromethane용매HCID 6422Trifluoroacetic acid용매

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온도
0 °C

실험 절차

To a stirred mixture of 4-(benzyloxy)-2-nitroaniline (2.0 g, 8.2 mmol) in TFA (14 mL) at −15° C. was added sodium triacetoxyborohydride (2.84 g, 12 mmol). Then a solution of 2-(methylthio)benzo[d]thiazole-6-carbaldehyde (1.9 g, 9.0 mmol) from Step 1 of Example 100 in DCM (10 mL) was added dropwise. The reaction mixture was allowed to warm to 0° C. and stir for 2 h. The mixture was partitioned between DCM and water. The organic layer was separated and washed sequentially with saturated aq NaHCO3 and brine. The organic layer was separated, dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography eluting with a gradient of 10% EtOAc in petroleum ether to 100% EtOAc to afford 4-(benzyloxy)-N-((2-(methylthio)benzo[d]thiazol-6-yl)methyl)-2-nitroaniline (2.3 g, 64%) as a red-brown solid. 1H NMR (300 MHz, CDCl3) δ 8.34 (s, 1H), 7.84 (d, J=8.4 Hz, 1H), 7.72-7.77 (m, 2H), 7.33-7.43 (m, 6H), 7.14 (m, 1H), 6.76 (d, J=9.6 Hz, 1H), 5.02 (s, 2H), 4.64 (d, J=5.7 Hz, 2H), 2.79 (s, 3H); LCMS (ESI) m/z 438 (M+H)+.

후처리

  1. customThe mixture was partitioned between DCM and water
  2. customThe organic layer was separated
  3. washwashed sequentially with saturated aq NaHCO3 and brine
  4. customThe organic layer was separated
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by silica gel flash chromatography
  9. washeluting with a gradient of 10% EtOAc in petroleum ether to 100% EtOAc

출처 및 근거

ORD 기록
ord-d85169c2270e4ca79bcdc6fe7db29415
출처 데이터셋
uspto-grants-2015_02
특허 번호
US08952058B2

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