(S)-tert-butyl 4-[(5S,6S)-6-(methoxycarbonyl)-2,2,3,3,8,8,9,9-octamethyl-4,7-dioxa-3,8-disiladecan-5-yl]-2,2-dimethyloxazolidine-3-carboxylate 在
silica supported ferrichloride hexahydrate 作用下,
以
氯仿 为溶剂,
反应 17.0h,
以45%的产率得到tert-butyl (3S,4S,5S)-4,5-bis(tert-butyldimethylsilyloxy)-6-oxo-tetrahydro-2H-pyran-3-ylcarbamate