(5-Nitro-pyrazin-2-yl)-(2-triethylsilanyloxy-ethyl)-amine → N-(2-triethylsilanyloxy-ethyl)-pyrazine-2,5-diamine
反応式
[N+:1]([C:4]1[N:5]=[CH:6][C:7]([NH:10][CH2:11][CH2:12][O:13][Si:14]([CH2:19][CH3:20])([CH2:17][CH3:18])[CH2:15][CH3:16])=[N:8][CH:9]=1)([O-])=O>C(OCC)(=O)C.[Pd]>[CH2:19]([Si:14]([CH2:15][CH3:16])([CH2:17][CH3:18])[O:13][CH2:12][CH2:11][NH:10][C:7]1[CH:6]=[N:5][C:4]([NH2:1])=[CH:9][N:8]=1)[CH3:20]参加物
4
実験手順
A solution of (5-nitro-pyrazin-2-yl)-(2-triethylsilanyloxy-ethyl)-amine (530 mg, 1.78 mmol) in ethyl acetate (25 mL) was treated with 10% palladium on activated carbon (60 mg). The reaction mixture was then placed on a Parr shaker under a hydrogen atomsphere of 50 psi for 4 h. The catalyst was then filtered off through a pad of celite, and the celite pad was then washed well with ethyl acetate. The filtrate was then concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, ethyl acetate) afforded N-(2-triethylsilanyloxy-ethyl)-pyrazine-2,5-diamine (459 mg, 96%) as an orange-brown solid: (ES)+-HRMS m/e calcd for C12H24N4O2Si (M+H)+ 269.1792, found 269.1794.