25-cyclohexylavermectin B2 在
manganese(IV) oxide 作用下,
以
二氯甲烷 为溶剂,
反应 23.0h,
以83%的产率得到(1R,4S,4'S,5'S,6R,6'R,8R,10E,12S,13S,14E,16E,20S,24S)-6'-cyclohexyl-4',24-dihydroxy-12-[(2R,4S,5S,6S)-5-[(2S,4S,5S,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-5',11,13,22-tetramethylspiro[3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6,2'-oxane]-2,21-dione