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Methyl 10-bromo-3-iodo-6,7-dihydro-5H-5,7-methanobenzo[c]imidazo[1,2-a]azepine-2-carboxylate → methyl 10-bromo-3-((3-methyloxetan-3-yl)methyl)-6,7-dihydro-5H-5,7-methanobenzo[c]imidazo[1,2-a]azepine-2-carboxylate

HRID 575468
ノート
印刷プレビュー

反応式

HRID 575468 の反応式
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[CH:11]3[CH2:12][CH:9]([CH2:10]3)[N:8]3[C:13](I)=[C:14]([C:16]([O:18][CH3:19])=[O:17])[N:15]=[C:7]3[C:6]=2[CH:21]=1.[I-].[CH3:23][C:24]1([CH2:28][Zn+])[CH2:27][O:26][CH2:25]1>CC(N(C)C)=O>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[CH:11]3[CH2:12][CH:9]([CH2:10]3)[N:8]3[C:13]([CH2:23][C:24]4([CH3:28])[CH2:27][O:26][CH2:25]4)=[C:14]([C:16]([O:18][CH3:19])=[O:17])[N:15]=[C:7]3[C:6]=2[CH:21]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

4

反応物 2

HCID 86693477Methyl 10-bromo-3-iodo-6,7-dihydro-5H-5,7-methanobenzo[c]imidazo[1,2-a]azepine-2-carboxylateHCID 178429773HCID 178429773、化合物

生成物 1

HCID 86693533methyl 10-bromo-3-((3-methyloxetan-3-yl)methyl)-6,7-dihydro-5H-5,7-methanobenzo[c]imidazo[1,2-a]azepine-2-carboxylate収率 40.4%

試薬・触媒・溶媒 1

HCID 31374Dimethylacetamide溶媒

反応条件

温度
90 °C

実験手順

A solution of methyl 10-bromo-3-iodo-6,7-dihydro-5H-5,7-methanobenzo[c]imidazo[1,2-a]azepine-2-carboxylate (75 mg, 0.16 mmol) in 1 mL DMA was sparged with nitrogen and treated with ((3-methyloxetan-3-yl)methyl)zinc(II) iodide (1.11 mL, 0.59 M, 0.65 mmol) reagent while nitrogen was sparging. After 1 min, solid Pd(PPh3)4 (ca. 10 mol %) was added and the mixture stirred at 90° C. overnight. The mixture was diluted with ammonium chloride and extracted with ethyl acetate. The combined organics were washed with brine, dried over sodium sulfate and concentrated by rotoevaporation. Purification by flash column chromatography (12 g isco, 10-100% EtOAc) gave 27 mg of methyl 10-bromo-3-((3-methyloxetan-3-yl)methyl)-6,7-dihydro-5H-5,7-methanobenzo[c]imidazo[1,2-a]azepine-2-carboxylate. This product was taken up in 1 mL of DMF and treated with 0.2 mL formamide then 0.2 mL of 25% wt NaOMe in MeOH. After 1 hour at room temp, the mixture was diluted with ammonium chloride and extracted with ethyl acetate. The combined organics were washed with brine, dried over sodium sulfate and concentrated by rotoevaporation. This material was used in subsequent operations without further purification.

後処理

  1. customwas sparging
  2. additionsolid Pd(PPh3)4 (ca. 10 mol %) was added
  3. additionThe mixture was diluted with ammonium chloride
  4. extractionextracted with ethyl acetate
  5. washThe combined organics were washed with brine
  6. dry with materialdried over sodium sulfate
  7. concentrationconcentrated by rotoevaporation
  8. customPurification by flash column chromatography (12 g isco, 10-100% EtOAc)

出典と根拠

ORDレコード
ord-3e8bef9b9f0345c7bd61ec68c94e2616
出典データセット
uspto-grants-2015_05
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09034866B2

反応ノート

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