(3R,4S,8R,14E)-25-chloro-3-(2-iodoethynyl)-24-methoxy-6,6-dimethyl-18-oxo-2,5,7-trioxa-17-azatetracyclo[19.3.1.04,8.04,11]pentacosa-1(24),10,14,21(25),22-pentaen-12-yne-14-carbaldehyde 在
4-叔丁基吡啶 、 chromium dichloride 、 nickel dichloride 作用下,
以
四氢呋喃 为溶剂,
反应 24.0h,
以67%的产率得到(1R,13E,20R,24S,27S)-28-chloro-27-hydroxy-4-methoxy-22,22-dimethyl-2,21,23-trioxa-11-azapentacyclo[12.10.3.13,7.017,24.020,24]octacosa-3,5,7(28),13,17-pentaen-15,25-diyn-10-one