2-叠氮基乙醇 、
4(S)-乙酰氧基-N-[(2R,3R,5S,6S)-6-[5-[(3R,4R,5R,7S)-4,7-二羟基-7-甲基-1,6-二氧杂螺[2.5]辛烷-5-基]-3-甲基-2(E),4(E)-戊二烯基]-2,5-二甲基四氢吡喃-3-基]-2(Z)-戊烯酰胺 在
Amberlyst 15 作用下,
反应 6.0h,
以73%的产率得到Acetic acid (Z)-(S)-3-((2R,3R,5S,6S)-6-{(2E,4E)-5-[(3R,4R,5R,7S)-7-(2-azido-ethoxy)-4-hydroxy-7-methyl-1,6-dioxa-spiro[2.5]oct-5-yl]-3-methyl-penta-2,4-dienyl}-2,5-dimethyl-tetrahydro-pyran-3-ylcarbamoyl)-1-methyl-allyl ester