methyl phenylphosphinate 、
2,3,5-tri-O-acetyl-D-erythro-pentos-4-ulose 1',3'-dimethyl-1',3'-propanediyl acetal (E,Z)-4-<(p-tolylsulfono)-hydrazide> 在
三氟甲磺酸 作用下,
以68%的产率得到(4RS)-2,3,5-tri-O-acetyl-4-deoxy-4-C-<(RS)-methoxy-phenylphosphinyl>-4-C-<(p-tolylsulfono)hydrazino>-D-erythro-pentose 1',3'-dimethyl-1',3'-propanediyl acetal