The N1-and N3-cyanohydantoins, a new series of derivatives, were prepared by reaction of the parent hydantoin with a base and a cyanogen halide. Analysis of ir, pmr, and mass spectral data allowed the assignment of ring position-3 to the cyano group in derivatives IIa,b of 1,3-unsubstituted hydantoins. 3-Cyanohydantoins can transfer the cyano substituent to strong nucleophiles via an addition-elimination
所述Ñ 1 -and Ñ 3个-cyanohydantoins,一系列新的衍
生物的,通过用碱和卤化
氰的父乙内酰
脲反应而制备。通过对ir,pmr和质谱数据的分析,可以将环位置3分配给1,3-未取代的乙内酰
脲衍
生物IIa,b中的
氰基。3-
氰基乙内酰
脲可以通过加成消除法将
氰基取代基转移到强亲核体上。