反应详情

A solution of 56 mg (190 μmol) of (8S,11R)-11-amino-8-isopropyl-6-oxa-1,9,14-triazabicyclo[11.2.1]hexadeca-13(16),14-dien-10-one from step D in 5 ml of DMF was cooled to 0° C. and, while stirring, 32 mg (194 μmol) of 1,1′-carbonyldiimidazole were added. The mixture was stirred for 30 min, and then 64 mg (190 μmol) of tert-butyl (S)-2-amino-3-(6-tert-butoxycarbonylaminopyridin-3-yl)propionate were added, and the mixture was warmed to RT. After standing overnight, the same amount of 1,1′-carbonyldiimidazole was again added, and the mixture was stirred for a further 24 h. It was then concentrated and purified by preparative HPLC. 27 mg of the desired compound were obtained.

1. stirringThe mixture was stirred for 30 min
2. stirringthe mixture was stirred for a further 24 h
3. concentrationIt was then concentrated
4. custompurified by preparative HPLC