Ring-expansions and ring-annulations based on 3-substituted 1,2-benzisothiazole-1,1-dioxides have lead to a variety of novel heterocyclic systems. The reaction of 3-substituted (1H)-1-isoindolones with 1-diethylamino-1-propyne has also resulted in new, ring-expanded molecules in good to modest yields.
                                    基于3-取代的1,2-
苯并噻唑-1,1-二氧化物的环扩环和环环化导致了各种新颖的杂环系统。3-取代的(1 H)-1-异
吲哚酮与1-
二乙基氨基-1-
丙炔的反应还产生了新的,扩环的分子,收率良好至适中。