作者:Xiaochun Han、Brendan Twamley、Nicholas R. Natale
DOI:10.1002/jhet.5570400321
日期:2003.5
b and 6a,b) were prepared via 1,3-dipolar cycloaddition between the obtained nitrile oxides 1a (or 1b) and two different dipolarophiles: ethyl β-pyrrolidinocrotonate (an enamine of ethyl acetoacetate) or dimethyl acetylenedicarbox-ylate (DMAD) respectively. The 10 (or 10′)- position of the anthracene in either anthracene-9-nitrile oxide or 3-(9′-anthracenyl) isoxazole molecules (3,4) is readily halogenated
10卤代(Cl或Br)蒽-9-腈氧化物(1a,b)是直接从DMF中用N-卤代琥珀酰亚胺(NCS或NBS)处理9-蒽基醛肟而获得的。3-(10'-卤代9'-蒽基)-5-异恶唑酯(5a,5b中和图6A,B)中制备经由 1,将得到的腈氧化物之间3-偶极环加成1A(或1B)和两种不同的双极性亲和剂:分别为β-吡咯烷基巴豆酸乙酯(乙酰乙酸乙酯的烯胺)或乙炔基二羧酸二甲酯(DMAD)。蒽9-腈氧化物或3-(9'-蒽基)异恶唑分子中蒽的10(或10')位(3,4)容易被DMF中的N-卤代嘧啶卤化。X射线研究表明5a拥有两个芳香环系统,它们位于共面74.4°处。连接两个环系统的键为1.4893(18)Å,表明两个环系统之间只有部分共轭。晶格显示出蒽环从头到尾的独特分子间堆叠。