New building blocks, 3,5-dihydro-1H-thieno[3,4-c]pyrrole 2,2-dioxides 3, have been prepared by the oxidation of their corresponding pyrroline derivatives 4 with DDQ or Chemical MnO₂. The Diels-Alder reaction of 3 with dimethyl acetylenedicarboxylate gave new types of compunds: 7-aza-2,3-dimethylenenorbornenes A, the 1:2 adducts B, 1a,3a,6,9-tetrahydrobenz[g]indoles C, and dihydroindolosulfolene D depending on the reaction conditions and the N-substituents. The reaction of 3 with bis(tert-butylsulfonyl)acetylene was also described.

中文翻译：

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新的结构单元，3,5-二氢-1 H-噻吩并[3,4- c ]吡咯2,2-二氧化物；炔二羧酸二甲酯的制备及其Diels-Alder反应

通过用DDQ或化学MnO ₂氧化相应的吡咯啉衍生物4，可以制备新的结构单元3,5-二氢-1 H-噻吩并[3,4- c ]吡咯2，2-二氧化物3。3与乙酰二羧酸二甲酯的Diels-Alder反应产生了新的化合物：7-氮杂-2,3-二亚甲基降冰片烯A，1：2加合物B，1a，3a，6,9-四氢苯并[ g ]吲哚C和dihydroindolosulfolene d取决于反应条件和ñ -取代基。3与二（叔）的反应还描述了-丁基磺酰基）乙炔。