Acetic Acid → HCID 57988996, 화합물

참여 물질

반응 단계

A solution of (R)-5-(2-amino-1-(tert-butyldimethylsilyloxy)ethyl)-8-hydroxyquinolin-2(1H)-one (WO2004106333) (0.261 g) in methanol (2 mL) was treated with acetic acid (0.030 mL) and stirred for 10 minutes. A solution of 2-(2-chloro-3-((4-(2-isopropylthiazole-4-carbonyl)-1-oxa-4,9-diazaspiro[5.5]undecan-9-yl)methyl)phenyl)acetaldehyde (example 80, step f) (0.247 g) in methanol (3 mL) was then added, and the resulting mixture was stirred at room temperature for 10 minutes, before cooling in ice-water and treating with sodium cyanoborohydride (0.102 g). The cooling bath was removed and the mixture was stirred at room temperature overnight. More sodium cyanoborohydride (0.101 g) was added, and the mixture was stirred over a second night. The solution was then concentrated onto flash silica in vacuo, and the resulting powder was purified by flash chromatography on silica eluted with 1:3:96 to 1:5:94 triethylamine:methanol:dichloromethane to afford the subtitled compound as a yellow oil. Yield 0.130 g.

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