toluene-4-sulfonic acid (2R,3S,4R,5R,6S)-6-[4-(4-ethylbenzyl)-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl]-3,4,5-trihydroxytetrahydropyran-2-ylmethyl ester 在
lithium aluminium tetrahydride 作用下,
以
四氢呋喃 为溶剂,
生成
(2S,3R,4R,5S,6R)-2-[4-(4-ethylbenzyl)-2-methyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl]-6-methyltetrahydropyran-3,4,5-triol