(2-{3,5-dibromo-4-[3-bromo-5-(2-{3-[3,5-dibromo-4-(9-bromo-2,8-dioxo-1-oxaspiro[4.5]deca-6,9-dien-7-yloxy)phenyl]propionylamino}ethyl)-2-hydroxyphenoxy]phenyl}ethyl)carbamic acid tert-butyl ester 在
sodium dithionite 作用下,
以
水 、
乙腈 为溶剂,
反应 0.17h,
以100%的产率得到3-[3-bromo-5-(2,6-dibromo-4-{2-[2-(3-bromo-5-{2,6-dibromo-4-[2-(tert-butoxycarbonylamino)ethyl]phenoxy}-4-hydroxyphenyl)ethylcarbamoyl]ethyl}phenoxy)-4-hydroxyphenyl]propionic acid