Synthesis of Phenanthrenes through Copper-Catalyzed Cross-Coupling of <i>N</i>-Tosylhydrazones with Terminal Alkynes
作者:Mohammad Lokman Hossain、Fei Ye、Zhenxing Liu、Ying Xia、Yi Shi、Lei Zhou、Yan Zhang、Jianbo Wang
DOI:10.1021/jo501489c
日期:2014.9.19
for the synthesis of phenanthrenes through the copper-catalyzed reaction of aromatic tosylhydrazones with terminal alkynes is explored. The reaction proceeds via the formation of an allene intermediate and subsequent six-π-electron cyclization–isomerization, affording phenanthrene derivatives in good yields. The transformation can be performed in two ways: (1) with N-tosylhydrazones derived from [1,1
探索了通过芳族甲苯磺酰hydr与末端炔烃的铜催化反应合成菲的新方法。该反应通过形成烯丙基中间体和随后的六-π电子环化-异构化而进行,从而以高收率获得了菲衍生物。转化可以通过两种方式进行:(1)用ñ -tosylhydrazones从[1,1'-联苯] -2- carbaldehydes和末端炔烃的原料和(2)与衍生ñ -tosylhydrazones从芳香醛和衍生以2-炔基联苯为原料。这种新的菲合成使用容易获得的原料和廉价的铜催化剂,并且具有广泛的官能团相容性。