dimethyl (1'S,2'S,3'R,4'R)-4-butyl-3-(1',2',3',4',5'-pentahydroxypentyl)-1H-pyrrole-2,5-dicabroxylate 在
sodium carbonate 作用下,
以
甲醇 为溶剂,
反应 1.0h,
以72%的产率得到methyl (4S,5S,1'R,2'R)-3-butyl-4-hydroxy-7-oxo-5-(1',2',3'-trihydroxypropyl)-1,4,5,7-tetrahydropyrano[3,4-b]pyrrole-2-carboxylate