(2R,3'aR,7'S,7'aS)-2',2'-dimethylspiro[1,4-dioxane-2,6'-3a,4,7,7a-tetrahydro-[1,3]dioxolo[4,5-c]pyran]-7'-ol 在
3 A molecular sieve
pyridinium chlorochromate 作用下,
以
二氯甲烷 为溶剂,
以83.6%的产率得到(2R,3'aR,7'aR)-2',2'-dimethylspiro[1,4-dioxane-2,6'-4,7a-dihydro-3aH-[1,3]dioxolo[4,5-c]pyran]-7'-one