(1S,2S,3S,4R)-methyl 3-(N-((R)-(tert-butylcarbamoyl)(4-chlorophenyl)methyl)-N-propargylamino)-7-oxa-bicyclo[2.2.1]hept-5-ene-2-carboxylate 、
乙烯 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
以79%的产率得到(2S,3S,3aS,7aR)-methyl 4-((R)-(tert-butylcarbamoyl)(4-chlorophenyl)methyl)-2,3,3a,4,5,7a-hexahydro-2,6-divinylfuro[3,2-b]pyridine-3-carboxylate