(3aR,5R,6R,6aR)-6-Allyl-6-benzyloxy-5-[(3aR,5R,6S,6aR)-2,2-dimethyl-5-(2-nitro-ethyl)-tetrahydro-furo[2,3-d][1,3]dioxol-6-yloxymethyl]-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxole 在
对氯苯异氰酸酯 、
三乙胺 作用下,
以
苯 为溶剂,
反应 48.0h,
以52%的产率得到(1R,7R,9R,10R,14R,16R,19S,20R,24R)-12,12,22,22-tetramethyl-9-phenylmethoxy-5,11,13,15,18,21,23,25-octaoxa-4-azahexacyclo[17.6.0.03,7.09,16.010,14.020,24]pentacos-3-ene