Cycloaddition reactions of 2<i>H</i>-benzo[<i>b</i>]thiete and conjugated cyclic dienes
作者:Dieter Gröschl、Herbert Meier
DOI:10.1002/jhet.5570330630
日期:1996.11
2H-Benzo[b]thiete 1 reacts with cyclopentadiene 3 in consecutive [8π + 2π]cycloadditions yielding the condensed heterocycles 6–8. Tetracyclone 9 on the other hand gives only the monoadduct 10. An [8π + 8π]cycloaddition can be observed for 1 and diphenylisobenzofuran 11. The related π system 13 shows again consecutive [477π + 27π]processes (1 + 13 ← 14, 15).
2 H-苯并[ b ]硫杂环丁烷1在连续的[8π+2π]环加成反应中与环戊二烯3反应,生成稠合杂环6-8。另一方面,四旋风分离器9仅给出单加合物10。可以观察到1和二苯基异苯并呋喃11的[8π+8π]环加成反应。相关的π系统13再次示出了连续的[477π+27π]过程(1 + 13←14、15)。