(5S,6R)-4-Pyrrolidin-1-yl-5-(tetrahydro-pyran-2-yloxy)-6-[(E)-2-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-vinyl]-5,6-dihydro-pyran-2-one 在
amberlyst-15 、 sodium cyanoborohydride 、
碳酸氢钠 作用下,
生成
(5S,6R,3'S,4'S,1'E)-5,6-dihydro-5-hydroxy-6-(3',4'-isopropylidenedioxy-1'-pentenyl)-2H-pyran-2-one