6-(马来酰亚胺基)己酸琥珀酰亚胺酯 、
(2S,3S,4S,5R,6S)-6-(2-(3-aminopropanamido)-4-((2-(3-(3-hydroxy-2-methyl-6-((3S)-3,5,12-trihydroxy-3-(2-hydroxyacetyl)-10-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracen-1-yloxy)-tetrahydro-2H-pyran-4-ylamino)propyl)oxazolidine-3-carbonyloxy)methyl)phenoxy)-3,4,5-trihydroxy-tetrahydro-2H-pyran-2-carboxylic acid 在
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以26%的产率得到(2S,3S,4S,5R,6S)-6-(2-(3-(6-(2,5-dioxo-2H-pyrrol-1(5H)-yl)hexanamido)propanamido)-4-((2-(3-(3-hydroxy-2-methyl-6-((3S)-3,5,12-trihydroxy-3-(2-hydroxyacetyl)-10-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracen-1-yloxy)-tetrahydro-2H-pyran-4-ylamino)propyl)oxazolidine-3-carbonyloxy)methyl)phenoxy)-3,4,5-trihydroxy-tetrahydro-2H-pyran-2-carboxylic acid