N-叔丁氧羰基-L-亮氨醇 、
N-(8-chloro-5-methyl-5H-chromeno[3,4-c]pyridin-4-yl)acetamide 以to afford tert-butyl((2S)-1-((4-acetamido-5-methyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (0.6 g, 0.882 mmol, 51% yield) as a yellow solid的产率得到tert-butyl ((2S)-1-((4-acetamido-5-methyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate