(E)-cinnamyl 3-(1,3-dibenzyl-2-oxo-2,3-dihydro-1H-imidazol-4-yl)-2-methyl-3-oxopropionate 在
manganese triacetate 、
溶剂黄146 作用下,
反应 3.0h,
以63%的产率得到(3RS,7RS,8SR)-10,12-dibenzyl-3-methyl-2,4,11-trioxo-8-phenyl-10,12-diaza-5-oxatricyclo[7.3.0.0
3,7]dodec-1(9)-ene