Sulfinyltoluquinones (2a–2c) were submitted to thermal or catalyzed [4+2] cycloaddition reactions with cyclopentadiene. For p-tolylsulfinyltoluquinones (2b) and (2c), almost complete C2–C3-chemo- and unlike-diastereoselectivity was achieved by catalysis with ZnBr2, yielding adducts 6. Under thermal conditions, Diels–Alder reaction took place at the C5–C6 double bonds of quinones 2a–2c, generating mixtures of diastereoisomeric like- and unlike-adducts 4. 
亚磺酰基
甲苯醌(2a-2c)与
环戊二烯进行了热反应或催化 [4+2] 环加成反应。对于对
甲苯磺酰基
甲苯醌 (2b) 和 (2c),在 ZnBr2 催化下几乎完全实现了 C2-C3 
化学选择性和非双向选择性,生成了加合物 6。在热条件下,
醌类化合物 2a-2c 的 C5-C6 双键发生了 Diels-Alder 反应,生成了非对映异构的同类和异类加合物混合物 4。