(2'S,3'R,4'S,5'R,6'R)-6'-(acetoxymethyl)-7-chloro-6-(4-ethylbenzyl)-3',4',5',6'-tetrahydrospiro[chroman-4,2'-pyran]-3',4',5'-triyl triacetate 在
甲醇 、
lithium methanolate 作用下,
反应 24.0h,
以83%的产率得到(2'S,3'R,4'S,5'S,6'R)-7-chloro-6-(4-ethylbenzyl)-6'-(hydroxymethyl)-3',4',5',6'-tetrahydrospiro[chroman-4,2'-pyran]-3',4',5'-triol