N-Boc-N-Me-L-Ala-(R)-Hep-N-Me-L-Ala-(R)-Hep 、 (R)-2-((S)-2-{Methyl-[(R)-2-((S)-2-methylamino-propionyloxy)-heptanoyl]-amino}-propionyloxy)-heptanoic acid benzyl ester; hydrochloride 在
N,N-二异丙基乙胺 、 bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以7.80 g的产率得到benzyl (R)‐2‐(((6S,9R,12S,15R,18S,21R,24S)‐2,2,5,6,11,12,17,18,23,24‐decamethyl‐4,7,10,13,16,19,22‐heptaoxo‐9,15,21‐tripentyl‐3,8,14,20‐tetraoxa‐5,11,17,23‐tetraazapentacosan‐25‐oyl)oxy)heptanoate