(3S,4S,5S)-3,4-dibenzyloxy-5-benzyloxymethyl-1-pyrroline-N-oxide 、
(3aS,4R,6aR)-4-ethynyl-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxole 在
copper(l) iodide 作用下,
以
乙腈 为溶剂,
反应 5.25h,
以72%的产率得到(2S,3S,4S)-3,4-bis(benzyloxy)-2-(benzyloxymethyl)-6-[(3aR,6R,6aS)-tetrahydro-2,2-dimethylfuro[3,4-d][1,3]dioxol-6-yl]-1-azabicyclo[3.2.0]heptan-7-one