[(3S,6S,13S)-3-Methyl-2,5-dioxo-13-((S)-5-oxo-tetrahydro-furan-2-yl)-1,4-diaza-cyclotridec-6-yl]-carbamic acid tert-butyl ester 、
L-valine benzylamide 在
2-羟基吡啶 作用下,
生成 tert-butyl N-[(3S,6S,13S)-13-[(1S)-3-{[(1S)-1-(benzylcarbamoyl)-2-methylpropyl]carbamoyl}-1-hydroxypropyl]-3-methyl-2,5-dioxo-1,4-diazacyclotridecan-6-yl]carbamate