(1R,4R)-2-oxa-5-azabicyclo[2.2.1]heptan-3-one 在
N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
乙腈 为溶剂,
生成
(1R,4R)-5-(3-(2-((9H-purin-6-ylthio)methyl)-5-chloro-4-oxoquinazolin-3(4H)-yl)-4-methoxybenzoyl)-2-oxa-5-azabicyclo[2.2.1]heptan-3-one