(4Z,20Z)-2,3,7,12-13,18,22,23-octamethyl-(1H,10H,15H,24H,25H,26H,27H,28H,29H)-pentapyrrin-1,24-dione-8,17-dipropanoic acid dimethyl ester 在
sodium hydroxide 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 3.0h,
以82%的产率得到(4Z,20Z)-2,3,7,12,13,18,22,23-octamethyl-(1H,10H,15H,24H,25H,26H,27H,28H,29H)-pentapyrrin-1,24-dione-8,17-dipropanoic acid