I'm almost definitely misremembering but wasn't it:
1. White Sox wanted Benintendi or Moncada, Red Sox said no to Benintendi.
2. Kopech was the second piece.
3. White Sox wanted Devers as the third piece, to which the Red Sox said no, so the White Sox settled on Basabe and Diaz.
Before posting I just decided to check and this seems to be the case (at least according to Dombrowski after the fact): https://www.nbcsports.com/boston/red-sox/how-close-did-red-sox-come-trading-rafael-devers-chris-sale-let-dave-dombrowski-explain