2-(9
H-fluoren-9-ylmethoxycarbonylamino)-
N-trityl-succinamic acid 1-{[
tert-butoxycarbonyl-(2-
tert-butoxycarbonyl-1-isopropylcarbamoyl-ethyl)-amino]-methyl}-4-methyl-2-(2,4,6-trimethyl-benzenesulfonylamino)-pentyl ester 在
1,2-乙二硫醇 三甲基溴硅烷 、
茴香硫醚 、
间甲酚 作用下,
以
三氟乙酸 为溶剂,
以33%的产率得到(S)-2-(9H-Fluoren-9-ylmethoxycarbonylamino)-succinamic acid (1S,2R)-2-amino-1-[((S)-2-carboxy-1-isopropylcarbamoyl-ethylamino)-methyl]-4-methyl-pentyl ester