N-(2-pyridyl)triflimide 、
(+)-(2S,5S,6R)-1-aza-2-(3-furyl)-5-methyl-8-oxa-4,9-dioxobicyclo[4.3.0]nonane 在
lithium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
反应 1.5h,
以96%的产率得到Trifluoro-methanesulfonic acid (5S,8S,8aR)-5-furan-3-yl-8-methyl-3-oxo-1,5,8,8a-tetrahydro-oxazolo[3,4-a]pyridin-7-yl ester