4-(1,3-dimethyl-1H-indol-2-yl)-2-ethyl-4-oxobutanoic acid 、
3-amino-4-hydroxy-5-fluoropentanoic acid,tert-butyl ester 在
三乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以62%的产率得到