2,2-二甲氧基丙烷 、
{(1R,2R,3S)-2-Hydroxy-3-[(2R,3S)-3-((R)-1-hydroxy-ethyl)-4-oxo-azetidin-2-yl]-cyclohexyl}-methyl-carbamic acid benzyl ester 反应 2.0h,
以78%的产率得到[(1S,4aR,5R,8aS,8bR)-1-((R)-1-Hydroxy-ethyl)-3,3-dimethyl-2-oxo-octahydro-4-oxa-2a-aza-cyclobuta[a]naphthalen-5-yl]-methyl-carbamic acid benzyl ester