(11R,15S)-13-((1S,2S)-1,3-dihydroxy-1-phenylpropan-2-yl)-9,10-dihydro-9,10-[3,4]epipyrroloanthracene-12,14-dione 、
3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2,2'-diyl phosphorochloridite 在
吡啶 作用下,
以80%的产率得到(11R,15S)-13-((1S,2S)-1-phenyl-1,3-bis((2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepin-6-yl)oxy)propan-2-yl)-9,10-dihydro-9,10-[3,4]epipyrroloanthracene-12,14-dione