(E)-1-((1S,5R,7R)-10,10-Dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]dec-4-yl)-4-methyl-pent-2-en-1-one 在
N-溴代丁二酰亚胺(NBS) 作用下,
以80%的产率得到(E)-4-bromo-1-[(1S,5R,7R)-10,10-dimethyl-3,3-dioxo-3lambda6-thia-4-azatricyclo[5.2.1.01,5]decan-4-yl]-4-methylpent-2-en-1-one