[FormerLib]

...can you name the places/dates of such a synod or synods that have explicitly condemned the dogma of papal infallibilty, purgatory, the Immaculate Conception and the filioque.

There is no need as the Church does not need a synod to reject that which is outside of the Church. As these new concepts are created and added to other faiths, it only serves to increase their distance from the Orthodox Christian faith.

[Petrosius]

There is no need as the Church does not need a synod to reject that which is outside of the Church.

And by what authority can it be declared that papal infallibility, purgatory, the Immaculate Conception and the filioque are "outside of the Church"? Is this not begging the question? It is the position of the Latin church that they have always been taught and are not novelties. Indeed, we would hold that the Church without Peter (i.e., the pope) is the novelty.

[kosta50]

There is no need as the Church does not need a synod to reject that which is outside of the Church

Correct.