(E)-3-[(4R,5S,6R)-6-[[tert-butyl(dimethyl)silyl]oxymethyl]-5-hydroxy-2,2-dimethyl-1,3-dioxan-4-yl]prop-2-enoic acid 在
吡啶 、
2,4,6-三氯苯甲酰氯 作用下,
以
二氯甲烷 为溶剂,
以57.6 mg的产率得到(4R,4aS,8aR)-4-[(tert-butyldimethylsilyloxy)methyl]-2,2-dimethyl-4,4a-dihydropyrano[3,2-d][1,3]dioxin-6(8aH)-one