(19S)-12-[3-[tert-butyl(dimethyl)silyl]oxypropyl]-19-ethyl-19-hydroxy-17-oxa-3,13-diazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4,6,8,10,15(20)-heptaene-14,18-dione 在
triethylamine tris(hydrogen fluoride) 作用下,
以
四氢呋喃 为溶剂,
以98%的产率得到20-OH-5-(3-hydroxypropyl)camptothecin