The Synthesis of Benzannelated Annulenes. Tribenzo[<i>a</i>,<i>g</i>,<i>m</i>]-15,17-bisdehydro[18]annulene, and Bis[dibenzo[1,2:9,10]-11,13-bisdehydro[14]annuleno][5,6-<i>a</i>:5′,6′-<i>d</i>]benzene
作者:J\={u}ro Ojima、Michiko Enkaku、Chikako Uwai
DOI:10.1246/bcsj.50.933
日期:1977.4
The Wittig reaction between o-ethynylcinnamaldehyde (II) and α,α′-bis(triphenylphosphonio)-o-xylene dibromide (III) gave the corresponding acyclic compound (IV and V) in a good yield, while that between o-ethynylbenzaldehyde (VII) and α,α′,α″,α'″-tetrakis(triphenylphosphonio)durene tetrabromide (VIII) similarly afforded an acyclic compound (IX) in a moderate yield. The title compounds, VI and X, were
邻乙炔基肉桂醛(II)与α,α'-双(三苯基膦)-邻二甲苯二溴化物(III)的Wittig反应以良好的收率得到相应的无环化合物(IV和V),而邻乙炔基苯甲醛( VII)和α,α',α",α'"-四(三苯基膦)杜烯四溴化物(VIII)类似地以中等产率提供无环化合物(IX)。标题化合物 VI 和 X 分别通过 V(或 IV 和 V)和 IX 的氧化偶合获得。核磁共振谱的检查表明,X 的苯核两侧的 VI 和三苯并稠合的十四元外围是退变性的。