(2R,4S,6R,8S)-35,75-dibromo-34,36,74,76-tetrahydroxy-2,4,6,8-tetramethyl-1,3,5,7(1,3)-tetrabenzenacyclooctaphane-14,16,54,56-tetrayl tetrakis(4-methylbenzoate) 在
氢氧化钾 作用下,
以
甲醇 、
水 为溶剂,
生成 (2S,8R,14S,20R)-5,17-dibromo-2,8,14,20-tetramethylpentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3(28),4,6,9(27),10,12,15,17,19(26),21,23-dodecaene-4,6,10,12,16,18,22,24-octol