Di-tert-butyl dicarbonate → tert-butyl N-[3-(1,3-benzoxazol-2-yl)-5-bromo-2-pyridyl]-N-tert-butoxycarbonyl-carbamate

HRID 908400ノート

反応式

HRID 908400 の反応式
[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[C:10]1[C:11]([N:25]([C:33]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])[C:26](=[O:32])[O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[N:12][CH:13]=[C:14](B2OC(C)(C)C(C)(C)O2)[CH:15]=1.O1C2C=CC=CC=2N=C1C1C(N)=NC=C([Br:55])C=1.C(OC(OC(C)(C)C)=O)(OC(C)(C)C)=O>CN(C)C1C=CN=CC=1.CN(C=O)C>[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[C:10]1[C:11]([N:25]([C:33]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])[C:26](=[O:32])[O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[N:12][CH:13]=[C:14]([Br:55])[CH:15]=1

参加物

6

反応物 3

HCID 90495Di-tert-butyl dicarbonateHCID 673880093-(Benzoxazol-2-yl)-5-bromo-pyridin-2-amineHCID 67388208Tert-butyl N-[3-(1,3-benzoxazol-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-pyridyl]-N-tert-butoxycarbonyl-carbamate

生成物 1

HCID 67388003tert-butyl N-[3-(1,3-benzoxazol-2-yl)-5-bromo-2-pyridyl]-N-tert-butoxycarbonyl-carbamate

試薬・触媒・溶媒 2

HCID 142844-(Dimethylamino)pyridine触媒HCID 6228Dimethylformamide溶媒

反応条件

温度
25 °C

実験手順

The tert-butyl N-[3-(1,3-benzoxazol-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-pyridyl]-N-tert-butoxycarbonyl-carbamate used as starting material was prepared as follows: N,N-dimethylpyridin-4-amine (42.1 mg) was added to 3-(1,3-benzoxazol-2-yl)-5-bromo-pyridin-2-amine (500 mg) and di-tert-butyl dicarbonate (1.069 g) suspended in DMF (5 ml). The resulting mixture was stirred at 25° C. for 48 hours. The reaction mixture was quenched with a saturated aqueous solution of sodium hydrogencarbonate (15 ml). The resulting precipitate was collected by filtration, washed with water and dried. The crude was taken up into ethyl acetate and filtered through a pad of silica gel. The resulting filtrate was concentrated to afford tert-butyl N-[3-(1,3-benzoxazol-2-yl)-5-bromo-2-pyridyl]-N-tert-butoxycarbonyl-carbamate (710 mg) as a solid. NMR Spectrum: (CDCl3): 1.32 (s, 18H), 7.37-7.44 (m, 2H), 7.60 (dd, 1H), 7.80 (dd, 1H), 8.70 (d, 1H), 8.81 (d, 1H); Mass spectrum: M+H+ 491;

後処理

  1. customwas prepared
  2. customThe reaction mixture was quenched with a saturated aqueous solution of sodium hydrogencarbonate (15 ml)
  3. filtrationThe resulting precipitate was collected by filtration
  4. washwashed with water
  5. customdried
  6. filtrationfiltered through a pad of silica gel
  7. concentrationThe resulting filtrate was concentrated

出典と根拠

ORDレコード
ord-98a52cc0a1264b3fa54f8dad7fb2697d
出典データセット
uspto-grants-2011_09
特許番号
US08017611B2

反応ノート

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