Studies in the cycloproparene series: oxygen-containing 1H-cyclopropa[b]naphthalenes and their methylidene derivatives
作者:Brian Halton、Andrew J. Kay、Zha Zhi-Mei、Roland Boeseb、Thomas Haumann
DOI:10.1039/p19960001445
日期:——
3,6-Dimethoxy-1H- cyclopropa[b]naphthalene 4 is available from 1,4-benzoquinone in four steps in 27–28% overall yield. The diether 4 provides a range of methylidene derivatives 15a–e by way of the disilyl compound 14, and is efficiently demethylated by cerium(IV) ammonium nitrate to provide 1H-cyclopropa[b]naphthalene-3,6-dione 16 (85%) whose crystal structure is reported. Quinone 16 is the first stable
3,6 -二甲氧基- 1 H ^ -环丙[ b ]萘图4是得自1,4-苯醌在27-28%总产率四个步骤。二醚4提供了由二甲硅烷基化合物14的方式的范围亚甲基衍生物15A-E的,并且被有效地由铈(IV)铵脱甲基化,以提供1个ħ -cyclopropa [ b ]萘-3,6 -二酮16(85 %)报告其晶体结构。醌16是第一个稳定的环丙基醌,但它不易转化为1-C外环烯烃。描述了化合物的化学性质,讨论了其光谱数据,并提供了16的循环伏安法。