Triphenylphosphine → 2-Methoxy-6-(6-methoxy-4-((2-methylthiazol-4-yl)methoxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole

HRID 625088

반응식

HRID 625088 반응식
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[O:9][C:8]([C:10]3[N:11]=[C:12]4[N:16]([CH:17]=3)[N:15]=[C:14]([O:18][CH3:19])[S:13]4)=[CH:7][C:6]2=[C:20]([OH:22])[CH:21]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:42][C:43]1[S:44][CH:45]=[C:46]([CH2:48]O)[N:47]=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1.ClCCl>[CH3:19][O:18][C:14]1[S:13][C:12]2=[N:11][C:10]([C:8]3[O:9][C:5]4[CH:4]=[C:3]([O:2][CH3:1])[CH:21]=[C:20]([O:22][CH2:48][C:46]5[N:47]=[C:43]([CH3:42])[S:44][CH:45]=5)[C:6]=4[CH:7]=3)=[CH:17][N:16]2[N:15]=1

참가 물질

7

반응물 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 10582809(2-Methyl-1,3-thiazol-4-yl)methanolHCID 722017096-Methoxy-2-(2-methoxyimidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzofuran-4-ol

생성물 1

HCID 721930092-Methoxy-6-(6-methoxy-4-((2-methylthiazol-4-yl)methoxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole수율 76.3%

시약·촉매·용매 2

HCID 6344Dichloromethane용매HCID 8028Tetrahydrofuran용매2회

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온도
50 °C

실험 절차

A mixture of 6-methoxy-2-(2-methoxyimidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzofuran-4-ol (Example 1H, 0.100 g, 0.315 mmol) and triphenylphosphine (0.123 g, 0.47 mmol) was maintained under vacuum for 10 minutes. The mixture was flushed with nitrogen and then charged with dry THF (8 mL) and (2-methylthiazol-4-yl)methanol (Example 1A, 0.049 g, 0.38 mmol). The mixture was warmed to 50° C. and sonicated for 5 minutes. The cooled mixture was treated with a solution of DIAD (0.096 g, 0.47 mmol) in dry THF (2 mL) added in three portions dropwise over 20 minutes. The mixture was homogeneous after 40 min. and was stirred at 22° C. for 6 h. The reaction mixture was diluted with dichloromethane (250 mL), washed with sat. sodium bicarbonate, brine and dried over anhydrous MgSO4. Evaporation gave a semi-solid residue which was purified by chromatography on silica gel (2.5×10 cm, dichloromethane/EtOAc 8:2) to provide the title material (0.103 g, 76%) as white cubes. LC (Method A): 2.224 min. HRMS (ESI) calcd for C19H17N4O4S2 [M+H]+ m/z 429.0686, found 429.0605. 1H NMR (CDCl3, 600 MHz) δ 7.82 (s, 1H), 7.17 (s, 1H), 7.06 (s, 1H), 6.67 (m, 1H), 6.39 (d, J=1.89 Hz, 1H), 5.25 (d, J=0.9 Hz, 2H), 4.18 (s, 3H), 3.82 (s, 3H), 2.72 (s, 3H).

후처리

  1. temperaturewas maintained under vacuum for 10 minutes
  2. customThe mixture was flushed with nitrogen
  3. customsonicated for 5 minutes
  4. additionadded in three portions dropwise over 20 minutes
  5. washwashed with sat. sodium bicarbonate, brine
  6. dry with materialdried over anhydrous MgSO4
  7. customEvaporation
  8. customgave a semi-solid residue which
  9. customwas purified by chromatography on silica gel (2.5×10 cm, dichloromethane/EtOAc 8:2)

출처 및 근거

ORD 기록
ord-71436999ae614d20bbbbb70ca03f9a7c
출처 데이터셋
uspto-grants-2016_04
특허 번호
US09303065B2

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