Diisopropylethylamine → (E)-6-{2-[methyl-(3-methyl-benzo[b]thiophen-2-ylmethyl)carbamoyl]vinyl}-2-oxo-1,2-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester

HRID 2097055ノート

反応式

HRID 2097055 の反応式
[CH3:1][N:2]([CH2:7][C:8]1[S:12][C:11]2[CH:13]=[CH:14][CH:15]=[CH:16][C:10]=2[C:9]=1[CH3:17])[C:3](=[O:6])[CH:4]=[CH2:5].[CH2:18]([O:20][C:21]([C:23]1[C:24](=[O:34])[NH:25][C:26]2[C:31]([CH:32]=1)=[CH:30][C:29](Br)=[CH:28][N:27]=2)=[O:22])[CH3:19].CCN(C(C)C)C(C)C>C(C#N)C.CN(C=O)C.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH2:18]([O:20][C:21]([C:23]1[C:24](=[O:34])[NH:25][C:26]2[C:31]([CH:32]=1)=[CH:30][C:29](/[CH:5]=[CH:4]/[C:3](=[O:6])[N:2]([CH3:1])[CH2:7][C:8]1[S:12][C:11]3[CH:13]=[CH:14][CH:15]=[CH:16][C:10]=3[C:9]=1[CH3:17])=[CH:28][N:27]=2)=[O:22])[CH3:19]

参加物

7

反応物 3

HCID 81531DiisopropylethylamineHCID 17930139N-methyl-N-(3-methyl-benzo[b]thiophen-2-ylmethyl)acrylamideHCID 53396436Ethyl 6-bromo-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate

生成物 1

HCID 59277530(E)-6-{2-[methyl-(3-methyl-benzo[b]thiophen-2-ylmethyl)carbamoyl]vinyl}-2-oxo-1,2-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester収率 56.3%

試薬・触媒・溶媒 3

HCID 167845palladium(II) acetate触媒HCID 6228Dimethylformamide溶媒HCID 7854Propionitrile溶媒

実験手順

A suspension of N-methyl-N-(3-methyl-benzo[b]thiophen-2-ylmethyl)acrylamide (500 mg, 2.04 mmol), 6-bromo-2-oxo-1,2-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester (665 mg, 2.24 mmol), (o-tol)3P (135 mg, 0.44 mmol) and DIEA (0.4 mL, 2.45 mmol) in EtCN (10 mL) and DMF (10 mL) was deoxygenated with argon for 30 min. Pd(OAc)2 (50 mg, 0.22 mmol) was added, the mixture was deoxygenated with argon for 20 min and then heated to reflux overnight. The mixture was cooled to room temperature and concentrated. The residue was partitioned between CH2Cl2 and H2O. The organic layer was washed with satd NaCl, dried (Na2SO4) and concentrated. Purification by column chromatography (silica gel, 89:10:1 CH2Cl2/MeOH/conc NH4OH) gave the title compound (530 mg, 56%) as a yellow solid and as a mixture of amide rotamers: 1H NMR (300 MHz, DMSO-d6) δ 12.63 (s, 1H), 8.98 (d, J=2.1 Hz, 1H), 8.67 (s, 1H), 8.44-8.42 (m, 1H), 7.88 (d, J=7.6 Hz, 1H), 7.75-7.52 (m, 2H), 7.43-7.31 (m, 3H), 5.14-4.91 (m, 2H), 4.32-4.25 (m, 2H), 3.18-2.96 (m, 3H), 2.43 (s, 3H), 1.33-1.27 (m, 3H); MS (ESI) m/e 462 (M+H)+.

後処理

  1. customwas deoxygenated with argon for 30 min
  2. customthe mixture was deoxygenated with argon for 20 min
  3. temperatureheated
  4. temperatureto reflux overnight
  5. concentrationconcentrated
  6. customThe residue was partitioned between CH2Cl2 and H2O
  7. washThe organic layer was washed with satd NaCl
  8. dry with materialdried (Na2SO4)
  9. concentrationconcentrated
  10. customPurification by column chromatography (silica gel, 89:10:1 CH2Cl2/MeOH/conc NH4OH)

出典と根拠

ORDレコード
ord-bdba28917cd14d748cc203c733dfbcda
出典データセット
uspto-grants-2013_05
特許番号
US08450307B2

反応ノート

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