Synthesis of azapenams, diazepinones, and dioxocyclams via the photolytic reaction of chromium alkoxycarbene complexes with imidazolines
作者:Claudia Betschart、Louis S. Hegedus
DOI:10.1021/ja00039a010
日期:1992.6
Photolysis of chromium alkoxycarbene complexes with N-(benzyloxycarbonyl)imidazolines produced protected azapenams. Hydrogenolysis gave free azapenams which stable, one of which was characterized by X-ray crystallography. Hydrogenolysis under acidic conditions produced hexahydro-1,4-diazepin-5-ones. treatment of the free azapenams with camphorsulfonic acid produced unsaturated 14-membered tetraazamacrocycles
铬烷氧卡宾配合物与 N-(苄氧羰基)咪唑啉的光解产生受保护的氮杂培南。氢解得到稳定的游离氮杂培南,其中之一通过 X 射线晶体学表征。在酸性条件下氢解产生六氢-1,4-二氮杂-5-酮。用樟脑磺酸处理游离氮杂培南以优异的产率产生不饱和的 14 元四氮杂大环。这些被还原为二氧环己酮