Allyl 6-O-(tert-Butyldimethylsilyl)-4-C-<(dimethylcarboxamido)methyl>-2,3,4-trideoxy-α-D-erythro-hex-2-enopyranoside 在
bromonium di-sym-collidine perchlorate 作用下,
以
氯仿 为溶剂,
以95%的产率得到(3R,3aR,4S,6S,7S,7aR)-3,7-Dibromo-4-(tert-butyl-dimethyl-silanyloxymethyl)-6-(2,3-dibromo-propoxy)-tetrahydro-furo[3,2-c]pyran-2-one