One-step ring condensation of hydrazine derivatives and cyclic anhydrides
作者:Anna Katrusiak、Andrzej Katrusiak
DOI:10.1016/j.molstruc.2014.12.050
日期:2015.4
condensation strongly depends on methyl and other substituents in the anhydrides and in hydrazine. The obtained products indicate that the ring condensation is controlled by the molecular strains and steric hindrances between the substituents in anhydrides and pyridazinone products. The condensation of cyclic anhydrides with hydrazines has been reduced to one-step reaction and its yield significantly increased
摘要 水合肼与柠康酸、2,3-二甲基马来酸酐、琥珀酸和顺式环己烷二甲酸酐在 HCl 水溶液中进行了羟基哒嗪酮和吡咯二酮环缩合反应。哒嗪-环缩合产生这些条件下出乎意料的产物。它们已通过 1 H/ 13 C NMR 和 X 射线衍射鉴定。向五元环和六元环缩合反应的过程很大程度上取决于酸酐和肼中的甲基和其他取代基。所得产物表明环缩合受酸酐和哒嗪酮产物中取代基之间的分子张力和位阻控制。