allyl 2,3,4-tri-O-pivaloyl-α-D-xylopyranoside 、 allyl 2,4-di-O-pivaloyl-α-D-xylopyranoside 在
N-碘代丁二酰亚胺 、 (1,5-cyclooctadiene)[bis(methyldiphenylphosphine)]iridium(I) hexafluorophosphate 、
三氟甲磺酸 作用下,
以71%的产率得到pivaloyl(-2)[pivaloyl(-3)][pivaloyl(-4)]Xyl(b1-3)[pivaloyl(-2)][pivaloyl(-4)]Xyl(a)-O-allyl