1-Thiocyanatobuta-1,3-dienes react with strong dienophiles to produce directly the rearranged products of type (6)via a combination of a Diels–Alder reaction with a [3,3] sigmatropic shift.
1-
硫氰酸根丁酯-1,3-二烯与强亲二烯体反应,通过Diels-Alder反应与[3,3]σ位移的组合直接产生类型(6)的重排产物。