7-amino-4-benzyl-3H-imidazo<2,3-c>-1,2,6-thiadiazine 5,5-dioxide 、 4-acetoxy-2-acyloxymethyl-1,3-oxathiolane 在
吡啶 、
三氟甲磺酸三甲基硅酯 、
potassium carbonate 、
六甲基二硅氮烷 作用下,
生成
trans-2-hydroxymethyl-5-(4'-amino-1'-benzyl-2',2'-dioxo-1'H,5'H-imidazo<4',5'-c><1',2',6'>-thiadiazin-5'-yl)-1,3-oxathiolane 、 cis-2-hydroxymethyl-5-(4'-amino-1'-benzyl-2',2'-dioxo-1'H,5'H-imidazo<4',5'-c><1',2',6'>-thiadiazin-5'-yl)-1,3-oxathiolane 、
trans-2-hydroxymethyl-5-(4'-amino-1'-benzyl-2',2'-dioxo-1'H,7'H-imidazo<4',5'-c><1',2',6'>-thiadiazin-7'-yl)-1,3-oxathiolane 、 cis-2-hydroxymethyl-5-(4'-amino-1'-benzyl-2',2'-dioxo-1'H,7'H-imidazo<4',5'-c><1',2',6'>-thiadiazin-7'-yl)-1,3-oxathiolane