Phthalocyanine or phthalimide?

Hey there,

Please may I have some advice on this chemical reaction? For an assignment, I am working on synthesising phthalocyanine. The easiest possible reaction I can think of is heating phthalic anhydride with urea, possibly prilled. However, when I look this up, I am presented only with phthalimide as a product for the reaction.

Does the same reaction yield different products under different conditions? Or is it a different reaction entirely?

If you can make phthalocyanine using this reaction, can I have some kind of detail on the apparatus, setup, and reaction conditions required?

And if you can't, does anyone have any alternative, simple reactions?

Thanks in advance for all help!