Methyl 2-(18-amino-2,5,8,11-tetraoxa-14-azabicyclo[13.4.0]nonadeca-1(15),16,18-trien-14-yl)acetate 、
(6'-Acetyloxy-5-carbonochloridoyl-2',7'-difluoro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3'-yl) acetate 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以63%的产率得到Methyl 2-[18-[(3',6'-diacetyloxy-2',7'-difluoro-3-oxospiro[2-benzofuran-1,9'-xanthene]-5-carbonyl)amino]-2,5,8,11-tetraoxa-14-azabicyclo[13.4.0]nonadeca-1(15),16,18-trien-14-yl]acetate