So, there isn't exactly a RAW or "legit" answer to this as far as I know. Cavall is correct that if you lose access to a feat or ability which is a pre-requisite for others, you lose all of them. However, there is a problem here: you have the benefit of Combat Reflexes in a specific circumstance. Is that circumstance sufficient to allow you to take a feat as a character which requires it? There is not a clear statement I have seen one way or the other. I've seen arguments saying you cannot, because your feat selections should be considered separate from anything else ; I've seen arguments suggesting that having a feat like Alertness from a familiar would be sufficient (class feature) where an Ioun Stone (purchased item) would not be; and I've seen the most permissive where it all works and you can take what you want.
If this is for PFS, I recommend finding a different way to handle it - get the feats you want as bonus feats, or take Combat Reflexes explicitly.. For anything else, ask your GM.
Edit: Just parsed from your wording that this would be a non-PFS game. Whoops. To answer directly: as best I know, Paizo has published language regarding losing pre-req feats, but none about qualifying for later feats in a chain with a circumstantial pre-req.