(2R,3S,4S,5R,6S)-2-(acetoxymethyl)-6-(((S)-1-(chloromethyl)-2,3-dihydro-1H-benzo[e]indol-5-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate 、
己二酰氯 在
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以125 mg的产率得到1,6-bis[(1S)-1-chloromethyl-5-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-1,2-dihydro-3H-benz[e]indol-3-yl]hexan-1,6-dione