Tributylphosphine → 2-Methoxy-6-(6-methoxy-4-((5-phenyl-1,2,4-thiadiazol-3-yl)methoxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole

HRID 1424349ノート

反応式

HRID 1424349 の反応式
[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.[C:23]1([C:29]2[S:33][N:32]=[C:31]([CH2:34]O)[N:30]=2)[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(P(CCCC)CCCC)CCC.N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O>C1COCC1.CCOC(C)=O>[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][CH2:34][C:31]5[N:30]=[C:29]([C:23]6[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=6)[S:33][N:32]=5)[C:6]=4[CH:7]=3)=[CH:17][N:16]2[N:15]=1

参加物

7

反応物 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 722017096-Methoxy-2-(2-methoxyimidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzofuran-4-olHCID 86700894(5-Phenyl-1,2,4-thiadiazol-3-yl)methanol

生成物 1

HCID 721933312-Methoxy-6-(6-methoxy-4-((5-phenyl-1,2,4-thiadiazol-3-yl)methoxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole収率 50.5%

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒HCID 8857Ethyl Acetate溶媒

実験手順

6-Methoxy-2-(2-methoxyimidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzofuran-4-ol (Example 1H, 8.25 mg, 0.026 mmol) and (5-phenyl-1,2,4-thiadiazol-3-yl)methanol (Example 7B, 5 mg, 0.025 mmol) were put in a flask and this was flushed with N2. Dry THF (4 mL) was added and to this resulting suspension was added tri-n-butylphosphine (0.017 mL, 0.065 mmol) and a solution of 1,1′-(azodicarbonyl)dipiperidine (16.57 mg, 0.065 mmol) in dry THF (2.5 mL) was added dropwise via a syringe pump over 2 h. The resulting being suspension was stirred for an additional 2 hours at RT, at which time LC showed that no starting material remained. The mixture was diluted with EtOAc, washed with 0.2N HCl, sat. aqueous NaHCO3 and brine, dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified on silica gel chromatography (50% dichloromethane/hexanes to 100% dichloromethane to 1% EtOAc/CH2Cl2 to 7% EtOAc/CH2Cl2) and lyophilized in MeCN/water to give the title material (6.2 mgs, 49%). LC (Method B): 2.615 min. HRMS (ESI) calcd for C23H18N5O4S2 [M+H]+ m/z 492.0795. found 492.0828. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.00 (dd, J=8.02, 1.37 Hz, 2H), 7.85 (s, 1H), 7.50-7.56 (m, 3H), 7.14 (s, 1H), 6.71-6.75 (m, 1H), 6.51 (d, J=1.57 Hz, 1H), 5.51 (s, 2H), 4.21 (s, 3H), 3.84 (s, 3H).

後処理

  1. customthis was flushed with N2
  2. additionDry THF (4 mL) was added and to this resulting suspension
  3. washwashed with 0.2N HCl, sat. aqueous NaHCO3 and brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified on silica gel chromatography (50% dichloromethane/hexanes to 100% dichloromethane to 1% EtOAc/CH2Cl2 to 7% EtOAc/CH2Cl2)

出典と根拠

ORDレコード
ord-73e238a8c7cc4a5e80744b11b91d9d4c
出典データセット
uspto-grants-2015_01
特許番号
US08927688B2

反応ノート

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