Access to the title compounds from unsaturated lactams 9 involves as the key step  reduction of the carbon-carbon double bond with triethylsilane/trifluoroacetic acid reagent to  give the trans-fused lactam product 10.
                                    从不饱和内酰胺 9 中获得标题化合物的关键步骤是用三乙基
硅烷/
三氟乙酸试剂还原碳碳双键,得到反式融合内酰胺产物 10。