Can I synthesize Altera Megawizard generated IP using third party synthesis tools?

Description

No, Altera® Megawizards IPs are designed only to work with Quartus® II software Analysis and Synthesis. They cannot be synthesized with 3rd party synthesis tools.

Here is an example on how to use Altera IP in Synplify:

Quartus II software help

* Synopsys Synplify Support (PDF)

You should either use the syn_black_box directive or in Verilog you can supply an empty module and Synplify will automatically infer it as a black box. This empty module is the *_bb.v file generated from the Megawizard.