在
silica gel 、
molybdenum(VI) oxide 作用下,
以
乙醇 为溶剂,
生成 (3aR,5R,7aS)-5-[(3R)-1,4-dioxaspiro[4.5]decan-3-yl]spiro[3a,5,6,7a-tetrahydro-[1,3]dioxolo[4,5-e][1,3]oxazine-2,1'-cyclohexane]-7-one 、 (3aR,5R,7aS)-5-[(3R)-1,4-dioxaspiro[4.5]decan-3-yl]spiro[7,7a-dihydro-3aH-[1,3]dioxolo[4,5-b][1,4]oxazine-2,1'-cyclohexane]-6-one