tert-butyl (2R,3R,6S)-2-((1R,2S,3S,4R,6S)-3-((2R,3R,4R,5R)-3,5-dihydroxy-5-methyl-4-(N-methyl-tert-butoxycarbonylamino)tetrahydro-2H-pyran-2-yloxy)-2-hydroxy-4-((S)-2-hydroxy-3-tert-butoxycarbonylaminopropanamido)-6-tert-butoxycarbonylaminocyclohexyloxy)-6-((2-nitro-N-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)phenylsulfonamido)methyl)tetrahydro-2H-pyran-3-ylcarbamate 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 、
2-巯基乙醇 作用下,
以
乙腈 为溶剂,
反应 2.5h,
以72%的产率得到tert-butyl (2R,3R,6S)-2-((1R,2SS,4R,6S)-3-((2R,3R,4R,5R)-3,5-dihydroxy-5-methyl-4-(N-methyl-tert-butoxycarbonylamino)tetrahydro-2H-pyran-2-yloxy)-2-hydroxy-4-((S)-2-hydroxy-3-tert-butoxycarbonylaminopropanamido)-6-tert-butoxycarbonylaminocyclohexyloxy)-6-((2-(tetrahydro-2H-pyran-2-yloxy)ethylamino)methyl)tetrahydro-2H-pyran-3-ylcarbamate