(4S,4a'S,10a'R)-2-amino-8'-hydroxy-1,10a'-dimethyl-3',4',4a',10a'-tetrahydro-2'H-spiro[imidazole-4,10'-pyrano[3,2-b]chromen]-5(1H)-one 、
N,N-二甲基甲酰胺二甲基缩醛 以
N,N-二甲基甲酰胺 为溶剂,
反应 16.0h,
以to give crude (E)-N′-((4S,4a′S,10a′R)-8′-hydroxy-1,10a′-dimethyl-5-oxo-1,3′,4′,4a′,5,10a′-hexahydro-2′H-spiro[imidazole-4,10′-pyrano[3,2-b]chromen]-2-yl)-N,N-dimethylformimidamide (134 mg, 100%)的产率得到(E)-N'-((4S,4a'S,10a'R)-8'-hydroxy-1,10a'-dimethyl-5-oxo-1,3',4',4a',5,10a'-hexahydro-2'H-spiro[imidazole-4,10'-pyrano[3,2-b]chromen]-2-yl)-N,N-dimethylformimidamide