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)。