Sneijder appeared close to moving to United at the start of the season.
But he remarked: "Manchester United? The contacts were never real, something like that. I looked around, I'm not blind, but with them I've never been in real contact."
The Danish wunderkind has been heavily linked with Manchester United but de Boer hopes he remains in Holland to further develop his game before eventually moving onto a bigger club.
His agent, Dirk Hebel, claims several of Europe's top clubs are chasing the attacking midfielder, who has not featured for Dortmund since December 11th due to a groin injury.
Manchester United are being linked with a late move for Sporting Lisbon striker Ricky van Wolfswinkel.
The Telegraph says if Chelsea do lodge an official bid for Rodwell in the new year, they are likely to face competition from Manchester United.
Record says the two clubs have come to a "gentlemen's agreement" which will see the Argentine move to Old Trafford at the end of the season.