(3R,4S)-3-amino-1-azabicyclo[2.2.1]heptane bis(hydro para-toluenesulfonate) 、
1-苯并呋喃-5-甲酸 在
N,N-二异丙基乙胺 、 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97.3%的产率得到N-[exo-(4S)-1-azabicyclo[2.2.1]hept-3-yl]-1-benzofuran-5-carboxamide