Phosphoric acid mono-[19-methyl-19-(2-{(5Z,10Z,14Z,19Z)-10,15,20-tris-[2-(2,2-dimethyl-propionylamino)-phenyl]-porphyrin-5-yl}-phenylcarbamoyl)-icosyl] ester 、 N-benzyloxycarbonyl L-serine benzyl ester 在
triisopropylbenzenesulfonyl chloride 作用下,
以90%的产率得到5-(α-o-(2',2'-dimethyl-20'-(2''-benzyloxycarbonylamino-2''-benzyloxycarbonylethylphosphonatoxy)icosanamido)phenyl)-10,15,20-tri(α,α,α-o-pivalamidophenyl)porphin