3,4-di-O-benzyl-6-O-(tert-butyldiphenylsilyl)-β-D-mannopyranose 1,2-(pent-4-enyl orthobenzoate) 、
1-O-allyl-3,4,5-tri-O-benzyl-D-myo-inositol 在
N-碘代丁二酰亚胺 、
ytterbium(III) triflate 作用下,
以92%的产率得到Benzoic acid (2R,3S,4S,5R,6R)-2-((1S,2R,3S,4S,5R,6S)-2-allyloxy-4,5,6-tris-benzyloxy-3-hydroxy-cyclohexyloxy)-4,5-bis-benzyloxy-6-(tert-butyl-diphenyl-silanyloxymethyl)-tetrahydro-pyran-3-yl ester