The Trotters are reportedly lining up an official approach for the Portuguese Under-20 international, who they saw up close when he played for the Hammers against them in the EFL Cup earlier this season.
However, that is one of only four senior appearances the 18-year-old has made this season, and he is still struggling to get a look in despite manager David Moyes struggling with a long injury list.
Now that the Hammers are out of the FA Cup a loan move is his best chance of first-team football.
Sky Sports adds that Bolton are already in talks with Crystal Palace about a return for Chung-Yong Lee, who has only made 10 league starts since leaving Wanderers for Selhurst Park three years ago.
The 29-year-old winger was more of a regular fixture at Bolton, for whom he made 195 appearances after arriving from South Korea in 2009, scoring 20 goals. Sky Sports understands that Eagles manager Roy Hodgson will sanction his departure, but only after tonight’s Premier League visit to West Ham.
Phil Parkinson’s side are the third lowest scorers in the Championship and appear to be targetting creative players to make them a scoring threat as they aim to move clear of the relegation battle.