Abstract Ring closure reactions of diaminomaleonitrile (DAMN) with electrophilic aryl isocyanates and aryl isothiocyanates lead to the formation of the target 5,5′-diimino-1,1′-diaryl-4,4′-biimidazolidinylidene-2,2′-diones 2a,b and 2,2′-diarylimino-4,4′-bithiazolidinylidenes 4a–e, respectively. The protocol provides a new strategy for the synthesis of a wide range of alkenes with two electron-donating and two withdrawing substituents of DAMN in moderate to good yields.

中文翻译：

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二氨基马来腈作为合成 4,4'-双咪唑烷亚基和 4,4'-联噻唑烷亚基的通用结构单元

摘要 二氨基马来腈 (DAMN) 与亲电子异氰酸芳基酯和异硫氰酸芳基酯的闭环反应导致目标 5,5'-diimino-1,1'-diaryl-4,4'-biimidazolidinylidene-2,2'-diones 的形成2a,b 和 2,2'-diarylimino-4,4'-bithiazolidinylidenes 4a-e，分别。该协议提供了一种新的策略，用于以中等至良好的收率合成具有两个给电子和两个吸电子取代基的 DAMN 的各种烯烃。