World Youth bronze medallist Dossen, pictured, progressed to the last-eight after a hard-earned but deserved victory over a home favourite.
The Olympic BC welter beat Russia’s European Junior champion Ivan Stupen on a split decision at the Black Sea Port to join Tommy Hyde in the quarter-finals.
The Galway teen will face an Armenian opponent on St Patrick’s Day for at least bronze.
Limerick welter Harty was beaten by Kazakh Aldivr Turnsinay on a unanimous verdict over three, three minute rounds.
“It was a fantastic performance from Gabriel and a brave performance from Jason against a quality opponent,” said Irish coach Billy McClean who is working Ireland’s corner in Anapa with Fergal McKenna.
Irish captain Aaron McKenna and Patrick Donovan, a World Junior silver medallist, are in action tomorrow.
Pavlyukov Youth Memorial Anapa, Russia March 15th/20th
69kg Gabriel Dossen (Ireland) beat Ivan Stupen (Russia) 3-2
69kg Jason Harty (Ireland) lost to Aldivr Turnsinay (Kazakhstan) 0-5
64kg: Aaron McKenna (Ireland) v Pavel Kamgnin (Estonia)
64kg: Patrick Donovan (Ireland) v Denik Nikogosyan (Armenia)
60kg: Eamer Coughlan (Ireland) v Otar Naveriani (Georgia)
69kg: Gabriel Dossen (Ireland) v TBC (Armenia)
75kg: Tommy Hyde (Ireland) v Aleksei Alferor (Belarus)
60kg Eamer Coughlan (Riverstown)
64kg Patrick Donovan (OLOL)
64kg Aaron McKenna (Old School)
69kg Gabriel Dossen (Olympic)
69kg Jason Harty (Rathkeale)
75kg Tommy Hyde (Setanta)
Team manager: Robbie Redmond
Coaches: Billy McClean and Fergal McKenna
R&J: Martin O’Neill