benzyl N-[(12S,15S,18S)-12-(hydroxymethyl)-15-(2-methylpropyl)-14,17-dioxo-2-oxa-5,6,7,13,16-pentaazatricyclo[18.2.2.1(4,7)]pentacosa-1(22),4(25),5,20,23-pentaen-18-yl]carbamate 在
戴斯-马丁氧化剂 作用下,
以
二氯甲烷 为溶剂,
以80%的产率得到benzyl N-[(12S,15S,18S)-12-formyl-15-(2-methylpropyl)-14,17-dioxo-2-oxa-5,6,7,13,16-pentaazatricyclo[18.2.2.1(4,7)]pentacosa-1(22),4(25),5,20,23-pentaen-18-yl]carbamate