1-((2R,3S)-3-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-2,3-dihydroxypropyl)-7,7-dimethyl-6,7-dihydro-1H,5H-pyrido[1,2,3-de]quinoxaline-2,3-dione 在
甲醇 、
二氯甲烷 作用下,
以
acetic acid monohydrate 为溶剂,
反应 3.0h,
以to afford compound 8 (15 mg, 55%, 3:1 inseparable diastereomers) as colourless gum的产率得到7,7-dimethyl-1-((2R,3S,4R)-2,3,4,5-tetrahydroxypentyl)-6,7-dihydro-1H,5H-pyrido[1,2,3-de]quinoxaline-2,3-dione