It marked the first game for the Canadiens under Coach Claude Julien, who was promoted Friday from Hamilton of the American Hockey League after Montreal fired Michel Therrien. The Canadiens fired a season-high 39 shots and tied it in a spirited third period.
But Montreal could not make it all the way back and record its first win of the season when trailing after two periods.
After defenseman Bryan McCabe separated Montreal's Oleg Petrov from the puck at the Toronto blue line, Tomas Kaberle worked it ahead to Antropov. The Russian center skated into the Canadiens' zone, stickhandled into the slot and wristed a shot that hit goaltender Jose Theodore and trickled into the net.
It was the 12th goal of the season and fourth in seven games for Antropov.
Travis Green and Robert Reichel scored in the first period for the Maple Leafs, who ended a three-game winless streak against the Canadiens.
Montreal got goals from Yanic Perreault and Mariusz Czerkawski but suffered its third straight loss and fell to 2-7-1-3 in the last 13 games.