双酮酞嗪 、
(1SR,2RS,3RS,6SR,7SR,8RS,9RS,10SR,13RS,14SR)-Dimethyl-4,5-bismethylene-15-oxahexacyclo[6.6.1.13,6.02,7.09,14]heptadeca-1,8-dicarboxylate 以
二氯甲烷 为溶剂,
以96%的产率得到(1RS,16SR,17RS,18SR,19SR,20RS,23SR,24RS,25RS,26SR)-Dimethyl-4,13-diaza-28-oxa-nonacyclo[14.10.1.1
18,25.1
20,23.0
2,5.0
4,13.0
6,11.0
17,26.0
19,24]nonacosa-2(15),6,8,10-tetraen-5,12-dione-18,25-dicarboxylate