[(1R)-(endo,anti)]-(+)-3-bromocamphor-8-sulfonic acid 、 2-methyl-6-nitro-1,3,4,9atetrahydro-2H-1,4a-propanobenzofuro[2,3-c]pyridine 以
丙酮 为溶剂,
以2.15 g的产率得到(1S,4aS,9aR)-2-methyl-6-nitro-1,3,4,9a-tetrahydro-2H-1,4a-propanobenzofuro[2,3-c]pyridine [(1R)-(endo,anti)]-(+)-3-bromocamphor-8-sulfonate