Trifluoroacetic acid → Tert-butyl 5-[5-[3-[bis(tert-butoxycarbonyl)amino]-6-bromopyrazin-2-yl]isoxazol-3-yl]indole-1-carboxylate

HRID 331497

反応式

HRID 331497 の反応式
[OH:1][N:2]=[CH:3][C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[N:9]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH:8]=[CH:7]2.[Br:20][C:21]1[N:22]=[C:23]([C:42]#[CH:43])[C:24]([N:27]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[C:28](=[O:34])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[N:25][CH:26]=1.C(OI(C1C=CC=CC=1)OC(=O)C)(=O)C.FC(F)(F)C(O)=O>CO>[C:38]([O:37][C:35]([N:27]([C:28]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:34])[C:24]1[C:23]([C:42]2[O:1][N:2]=[C:3]([C:4]3[CH:5]=[C:6]4[C:10](=[CH:11][CH:12]=3)[N:9]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH:8]=[CH:7]4)[CH:43]=2)=[N:22][C:21]([Br:20])=[CH:26][N:25]=1)=[O:36])([CH3:41])([CH3:40])[CH3:39]

参加物

6

反応物 4

HCID 6422Trifluoroacetic acidHCID 76724Iodobenzene diacetateHCID 58070394tert-butyl N-(5-bromo-3-ethynylpyrazin-2-yl)-N-[(tert-butoxy)carbonyl]carbamateHCID 88996357HCID 88996357、化合物

生成物 1

HCID 89037198Tert-butyl 5-[5-[3-[bis(tert-butoxycarbonyl)amino]-6-bromopyrazin-2-yl]isoxazol-3-yl]indole-1-carboxylate収率 16.5%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒2 回

実験手順

A solution of tert-butyl 5-((hydroxyimino)methyl)-1H-indole-1-carboxylate (260.3 mg, 1 mmol) in methanol (1 mL) was added slowly to a stirred solution of tert-butyl N-(5-bromo-3-ethynyl-pyrazin-2-yl)-N-tert-butoxycarbonyl-carbamate (438.1 mg, 1.100 mmol) and (diacetoxyiodo)benzene (354.3 mg, 1.100 mmol) in methanol (2 mL) containing trifluoroacetic acid (15 μL, 0.1947 mmol) at ambient temperature. The reaction was stirred at this temperature for 17 hours then concentrated in vacuo. The residue was purified by column chromatography (ISCO Companion, 40 g column) loaded with dichloromethane and eluted with 0 to 50% ethyl acetate/petroleum ether. Product fractions were combined and concentrate in vacuo to give the sub-title product as a white solid (108 mg, 16% Yield). 1H NMR (400.0 MHz, DMSO-d6) δ 1.22 (s, 18H), 1.57 (s, 9H), 6.73 (d, 1H), 7.69 (d, 1H), 7.80 (s, 1H), 7.89 (dd, 1H), 8.11 (d, 1H), 8.23 (d, 1H) and 8.94 (s, 1H) ppm.

後処理

  1. concentrationthen concentrated in vacuo
  2. customThe residue was purified by column chromatography (ISCO Companion, 40 g column)
  3. washeluted with 0 to 50% ethyl acetate/petroleum ether
  4. concentrationconcentrate in vacuo

出典と根拠

ORDレコード
ord-a68360ef282b44fe8b6fd13654043420
出典データセット
uspto-grants-2014_11
特許番号
US08877759B2

関連ノート

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