(1S,9S,13S,21S)-2,5,8,11,14,17,20,23-octaoxatricyclo[19.3.0.09,13]tetracosane-10,12,22,24-tetrone 、
邻苯二胺 以
二氯甲烷 为溶剂,
以95%的产率得到(1S,12S,20S,28S)-2,11-Dioxo-13,16,19,21,24,27-hexaoxa-3,10-diaza-tricyclo[10.8.8.0
4,9]octacosa-4(9),5,7-triene-20,28-dicarboxylic acid