First, the depth range of your frustum is [-1, -10] but you draw the quad at z=2, which is outside this range, and therefore not visible. You need to translate it to Z=-2 instead of Z=2.

But then there's one more thing. Your quad will be drawn correctly, but you still may not see it. At Z=-1, your frustum is 640x480 units in size (because of the values in glFrustum). That means, at Z=-2, the frustum will be 1280x960 units in size, and you draw a quad 1x1 units in size. So unless your window is at least 1280x960 pixels large, the quad will be less than a pixel large, and may not be drawn just because it's too small.

The horizontal field of view of your frustum is EXTREMELY large, close to 179.5 degrees. If you want, say, a 90 degree horizontal field of view, you should set the top and bottom parameters of glFrustum to about the same values as the near plane. Check out jyk's picture; if n is small and r and l is large, the field of view is large.