(1S,3aR,6aS)-N-[(3S)-1-(cyclopropylamino)-2-hydroxy-1-oxohexan-3-yl]octahydrocyclopenta[c]pyrrole-1-carboxamide 、
pyrazinoyl-Chg-Dap(Boc)(Boc)-OH 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
乙腈 为溶剂,
反应 1.0h,
以95%的产率得到tert-butyl N-[(2S)-3-[(3S,3aS,6aR)-3-[[(3S)-1-(cyclopropylamino)-2-hydroxy-1-oxohexan-3-yl]carbamoyl]-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrol-2-yl]-2-[[(2S)-2-cyclohexyl-2-(pyrazine-2-carbonylamino)acetyl]amino]-3-oxopropyl]carbamate