(2S)-2-endo-(methoxycarbonylethylcarbamoyl)bicyclo[2.2.1]hept-5-ene 、
di-tert-butyl (8S)-8β-(methoxycarbonylmethylcarbamoyl)-4-oxa-(1α,2β,3α,5α,6β,7α)-tetracyclo[5.2.1.02,6.03,5]decane-3,5-dicarboxylate 以
四氢呋喃 为溶剂,
反应 12.0h,
以41%的产率得到di-tert-butyl (4S,11S)-4β-(methoxycarbonylmethylcarbamoyl)-11β-(1-methoxycarbonylethylcarbamoyl)-16-oxa-(1α,2β,3α,6α,7β,8α,9β,10α,13α,14β)-hexacyclo[6.6.1.1
4,6.1
10,13.0
2,7.0
9,14]heptadeca-1,8-dicarboxylate