tris-(dibenzylideneacetone)dipalladium(0) 、 (S)-tert-butyl (5-(2-bromo-5-fluoropyridin-4-yl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate 、
5-methoxypyrazine-2-carboxamide 在
caesium carbonate 作用下,
以
1,4-二氧六环 、
氩 为溶剂,
以41.4%的产率得到N-(4-((3R)-5-amino-3,6,6-trimethyl-1,1-dioxido-3,6-dihydro-2H-1,4-thiazin-3-yl)-5-fluoro-2-pyridinyl)-5-methoxy-2-pyrazinecarboxamide