5,5-dibromo-1-(4-methoxyphenyl)-1,3-diazinane-2,4,6-trione 、
alpha-D-半乳糖 在
吡啶 作用下,
以
乙醇 为溶剂,
以76%的产率得到(3'aR,5'R,6'R,7'S,7'aR)-6',7'-dihydroxy-5'-(hydroxymethyl)-1-(4-methoxyphenyl)spiro[1,3-diazinane-5,2'-5,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-b]pyran]-2,4,6-trione