Are Goldman and JPMorgan breaking the rules of current sanctions by buying Russia's cheap corporate debt?

I just saw in Bloomberg

https://www.bloomberg.com/news/articles/2022-03-03/wall-street-is-already-pouncing-on-russia-s-cheap-corporate-debt

that Goldman Sachs Group Inc. and JPMorgan Chase & Co. have been purchasing beaten-down company bonds tied to Russia in recent days.

Isn't such an act breaking the current sanctions on Russia? I suppose by purchasing their bonds, Goldman and JPMorgan are helping Russia's economy.