3-Bromopyridine → HCID 21913309, Verbindung
Reaktionsgleichung
[CH2:1]([O:3][CH2:4][C:5]1[N:6]([CH2:19][CH2:20][O:21][CH2:22][C:23]#[CH:24])[C:7]2[C:12]([CH3:13])=[C:11]([CH3:14])[N:10]3[N:15]=[N:16][N:17]=[C:9]3[C:8]=2[N:18]=1)[CH3:2].C(OCCNC(=O)OC(C)(C)C)C#C.Br[C:40]1[CH:41]=[N:42][CH:43]=[N:44][CH:45]=1.BrC1C=NC=CC=1>>[CH2:1]([O:3][CH2:4][C:5]1[N:6]([CH2:19][CH2:20][O:21][CH2:22][C:23]#[C:24][C:40]2[CH:41]=[N:42][CH:43]=[N:44][CH:45]=2)[C:7]2[C:12]([CH3:13])=[C:11]([CH3:14])[N:10]3[N:15]=[N:16][N:17]=[C:9]3[C:8]=2[N:18]=1)[CH3:2]Komponenten
5
Versuchsvorschrift
The method described in Part B of Example 81 was followed. 8-Ethoxymethyl-5,6-dimethyl-7-(2-prop-2-ynyloxyethyl)-7H-imidazo[4,5-c]tetrazolo[1,5-a]pyridine (5.5 g, 17 mmol) was used as the starting material in lieu of tert-butyl 2-(prop-2-ynyloxy)ethylcarbamate, and 5-bromopyrimidine was used in lieu of 3-bromopyridine. The crude product was purified by column chromatography on silica gel (620 g, eluting with 98:2 dichloromethane:methanol), and the resulting solid was mixed with 2-propanol (150 mL). Insoluble impurities were removed by filtration, and the solution was concentrated to a volume of 20 mL. The product crystallized and was isolated by filtration and washed with 2-propanol and diethyl ether to provide 6.10 g of 8-ethoxymethyl-5,6-dimethyl-7-[2-(3-pyrimidin-5-ylprop-2-ynyloxy)ethyl]-7H-imidazo[4,5-c]tetrazolo[1,5-a]pyridine as white crystals.