、
N,N'-羰基二咪唑 在
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 3.0h,
以68%的产率得到tert-butyl N-[(2R)-1-[[(1S,2R,18R,19R,22S,25R,28R,40S)-48-[[(4aR,6S,7R,8R,8aS)-7,8-dihydroxy-2-oxo-4,4a,6,7,8,8a-hexahydro-3H-pyrano[2,3-e][1,3]oxazin-6-yl]oxy]-40-(2-adamantylcarbamoyl)-22-(2-amino-2-oxoethyl)-5,15-dichloro-2,18,32,35,37-pentahydroxy-20,23,26,42,44-pentaoxo-7,13-dioxa-21,24,27,41,43-pentazaoctacyclo[26.14.2.23,6.214,17.18,12.129,33.010,25.034,39]pentaconta-3,5,8(48),9,11,14,16,29(45),30,32,34(39),35,37,46,49-pentadecaen-19-yl]amino]-4-methyl-1-oxopentan-2-yl]-N-methylcarbamate