An alternative route to 2<i>H</i>-naphtho[1,2-<i>b</i>]thiete and its cycloaddition products
作者:Norbert Rumpf、Dieter Gröschl、Herbert Meier、Daniela C. Oniciu、Alan R. Katritzky
DOI:10.1002/jhet.5570350648
日期:1998.11
good leaving group; however, a subsequent nitrogen extrusion takes place under flash vacuum pyrolysis conditions and cyclopentadienecarbonitriles 6a,b are formed by a ring contraction (Scheme 1). Cycloaddition reactions of 5 and dienophiles or heterodienophiles yield the naphtho-condensed sulfur heterocycles 8, 10, 12 and 14 (Scheme 2).
2-(1 H-苯并三唑-1-基甲基)-1-萘酚(1)可以高产率转化为相应的硫醇4。闪蒸真空热解4会生成2 H-萘[1,2- b ]硫杂环丁烷(5)。苯并三唑基被证明是一个很好的离去基团。然而,随后的氮在快速真空热解条件下发生,并且环戊二烯腈6a,b通过环收缩形成(方案1)。的环加成反应5和亲二烯体或heterodienophiles得到萘缩合硫杂环8,10,12和14(方案2)。