Ethyl aminomethylene cyanoacetate

The reaction of copper(II) acetate with ethyl aminomethylene cyanoacetate of type H2(L22) (55) provides highly stable polymer 1Cu(L22) (56). The supra-molecular 2D geometry of 56 depends basically on the lateral groups of the chelate ligand. The two cyano donors of monomer [Cu(L22)] (57) coordinate differently, with the result that 56 is rather composed of zig-zag-lD-strands, linked among each other to give a 2D-network (Scheme 21) [167]. 

In contrast, when ethyl aminomethylene cyanoacetate of type 58 [H2(L23)] is reacted with copper(II) acetate, a one-dimensional stair-like rather than a 2D- or 3D-coordination polymer [CufL23)] (59) is generated. In 59, the monomers [Cu(L23)] (60) are not arranged perpendicularly as in the 2D-/3D-case, but parallel,... 

Cyclization of ethyl 2-[(2-quinolyl)aminomethylene]cyanoacetates (225) at 100°C under reduced pressure (58JA3066), and by heating in paraffin oil at 320-340°C (74MIP1) or in dibenzylbenzene at 320°C (79MIP2), gave 1-oxo-lH-py rimido-[l, 2-a]quinoline-2-carbonitriles (226). 

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