(5S,10S,15S,20S)-1-benzyl-5,10,15,20-tetramethyl-1,3,6,8,11,13,16,18-octazacycloicosane-2,7,12,17-tetrone 在
palladium on activated carbon
氢气 作用下,
以
乙醇 为溶剂,
反应 2.0h,
以73%的产率得到(4S,9S,14S,19S)-4,9,14,19-tetramethyl-1,3,6,8,11,13,16,18-octazacycloicosane-2,7,12,17-tetrone