The 20-year-old was rumoured to be the subject of interest from Barcelona before the start of the 2016-17 campaign, but opted to join Ajax from Atletico Nacional as he felt his first-team prospects were brighter in Amsterdam.
Sanchez has since made 29 Eredivisie appearances for an Ajax side that sit second in the league and just a point adrift of leaders Feyenoord.
His performances in the Dutch capital have seen links with a move to Barca resurface, but Sanchez is keen to win honours with Ajax.
"People in South America know Ajax as a nice gateway to a good career in Europe," the centre-back told Voetbal International.
"It is very flattering to be linked with a club like Barcelona.
"But I only just got here and I want to achieve something before making the next step.
"I am not thinking about it for now. Ajax are my main priority at this stage."
Sanchez has a contract with Ajax until June 2021.