Synthesis, Structure and Reactivity of a Cyapho-Cyanamide Salt

Synthesis, Structure and Reactivity of a Cyapho-Cyanamide Salt
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DOI:
10.1002/anie.202111619
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发表时间:
2021-10-22
影响因子:
16.6
通讯作者:
Goicoechea, Jose M.
Goicoechea, Jose M.
中科院分区:
化学1区
文献类型:
--
作者:
Ergocmen, Doruk;Goicoechea, Jose M.

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本文报道了由[Na(18-冠-6)][PH_2](18-冠-6 = 1,4,7,10,13,16-六氧杂环十八烷)与N-氰基碳亚胺酸二甲酯(MeO)(2)C=N(CN)反应合成氰基氰胺盐[Na(18-冠-6)][N(CN)(CP)]的简便方法。反应进行时消除两当量的甲醇。仔细调整反应条件,以分离和表征N-氰基(甲亚胺酸酯)磷化物中间体[HP{C(OMe)N(CN)}](-)。由于甲醇在这些反应混合物中的不利影响,可以通过添加碱(LiHMDS)中和所得醇来实现[Na(18-冠-6)][N(CN)(CP)]的批量规模合成。该阴离子的进一步反应性研究表明,在磷原子的官能化是可行的,以产生一个新的家庭的氰化物官能化的磷杂环。
We describe a facile synthesis of the cyapho-cyanamide salt [Na(18-crown-6)][N(CN)(CP)] from reaction of [Na(18-crown-6)][PH2] (18-crown-6=1,4,7,10,13,16-hexaoxacyclooctadecane) with dimethyl N-cyanocarbonimidate, (MeO)(2)C=N(CN). The reaction proceeds with elimination of two equivalents of methanol. Careful tuning of the reaction conditions allowed for the isolation and characterization of the N-cyano(carboximidate)phosphide intermediate [HP{C(OMe)N(CN)}](-). Due to the adverse effects of methanol in these reaction mixtures, a bulk scale synthesis of [Na(18-crown-6)][N(CN)(CP)] could be achieved by addition of a base (LiHMDS) to neutralize the resulting alcohol. Further reactivity studies of this anion reveal that functionalization at the phosphorus atom is viable to yield a new family of cyanide-functionalised phosphorus heterocycles.