Diisopropylethylamine → N-(3-((1R,5S)-8-oxa-3-azabicyclo[3.2.1]octan-3-yl)phenyl)-5-chlorothiazolo[5,4-d]pyrimidin-7-amine

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The mixture of 3-((1R,5S)-8-oxa-3-azabicyclo[3.2.1]octan-3-yl)aniline (0.061 g, 0.3 mmol), 5,7-dichlorothiazolo[5,4-d]pyrimidine (0.061 g, 0.3 mmol) and DIPEA (0.046 g, 0.36 mmol) in DMSO (10 mL) was heated to 30° C. for 2 h. Then it was diluted with water and extracted with ethyl acetate (3×10 mL), the organics were dried and concentrated. The residue was purified by column chromatography (silica gel, 200˜300 mesh, eluting with MeOH:DCM=1:80) to afford N-(3-((1R,5S)-8-oxa-3-azabicyclo[3.2.1]octan-3-yl)phenyl)-5-chlorothiazolo[5,4-d]pyrimidin-7-amine (0.095 g, 86%) as a yellow solid. LC-MS: 374 [M+H]+, tR=1.66 min.

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