α-bromo-d-camphor-π-sulfonic acid 、 rac-(1α,4aα,9aα)-1,3,4,9a-tetrahydro-2-methyl-6-nitro-2H-1,4a-propanobenzofuro[2,3-c]pyridine 以
丙酮 为溶剂,
以2.48 g的产率得到(1R,4aR,9aS)-2-methyl-6-nitro-1,3,4,9a-tetrahydro-2H-1,4a-propanobenzofuro[2,3-c]pyridine [(1S)-(endo,anti)]-(-)-3-bromocamphor-8-sulfonate