(5R,6S,E)-isopropyl 5-acetamido-8-ethyl-6-hydroxy-2,2-dimethoxydec-3-enoate 在
iron(III) chloride hexahydrate 作用下,
以
二氯甲烷 为溶剂,
以75%的产率得到2-methyl-(isopropyl 5-acetamido-2,6-anhydro-7-cyclopentyl-3,5,7-trideoxy-D-altro-hetp-2-enoate)-[4,5-d]-2-oxazoline