Linear 1,2,3,4-heterohexatrienes of type H2C=CHP(R)2=NP(R′)2=X (X = O, S) are used in Michael-type additions of various primary or secondary amines and hydrazines. The use of functionalized amines allowed the grafting of other functions, such as a double or a triple bond, a sulfide, an imidazole, or a phenol, and various types of NH2 groups. These groups were used in condensation reactions, leading to the grafting of new functions such as phenols. Thus, the P(R)2=NP(R′)2=X group appears as a new electron withdrawing group, very easily tunable by changing the R′ or X substituents.
线性1,2,3,4-异构六
炔烃的类型H2C=CHP(R)2=NP(R′)2=X(X = O, S)在各种初级或次级胺和
肼的迈克尔反应中被使用。功能化胺的使用允许其他功能的接枝,如双键或三键、
硫化物、
咪唑或
酚,以及各种类型的NH2基团。这些基团被用于缩合反应,导致新的功能接枝,例如
酚。因此,P(R)2=NP(R′)2=X基团作为一种新的电子吸引基团出现,通过改变R′或X取代基非常容易调节。