They defeated South Liberties in Caherconlish with 12 points to spare in this one-sided quarter final tie.
Doon played with the wind in the opening half and had built a 0-11 to 0-5 lead by half time.
Liberties were over reliant on the free-taking of Mark Keane.
Doon had scores from Ryan brothers, Micheal and Pat, while Niall Maher and Roger Ryan also found the range for the favourites, who had reached the last eight with a 100% record.
Despite the six point half time advantage, South Liberties stuck to the challenge and were still in contention in the early stages of the second half with a Keane point from a free and Brian Slattery from play keeping Doon in sight.
But then with just under 20 minutes to play Doon struck the all important goal. It came from sub Dean Coleman. The Limerick minor corner forward was only on the field a couple of minutes when he goaled to open a winning margin.
Coleman is one of four Limerick minors in the Doon side with Richard English, Darragh O’Donovan and Pat Ryan all starting for a youthful side that are the newcomers to the Limerick SHC semi-finals for 2013.
With the goal giving their side breathing space they eased to the winning line with nine different scores.
Scorers for Doon: M Ryan (0-6, 3f), D Coleman (1-1), D O’Donovan, N Maher, C McNamara (2f), R Ryan (0-2 each), R English, P Ryan, M Fitzgerald (0-1 each).
Scorers for South Liberties: M Keane (0-8, 5f), Brian Slattery 0-1.
DOON: D Stapleton; S Barry, M Crowe, E Fitzgibbon; D Moloney, C McNamara, R English; N Maher, D O’Donovan; P Ryan, G Allis, R Ryan; M Ryan, M Fitzgerald, G McPartland.
Subs: R Maher for G Allis (26), D Coleman for G McPartland (39), M Barry for R Maher (42), L Ryan for P Ryan (48), D Stapleton for M Fitzgerald (57).
SOUTH LIBERTIES: P Butler; M Moynihan, D Grimes, P Carroll; Michael Keane, S O’Neill, T Ryan; C O’Neill, R O’Neill; J Butler, B Nash, W Hickey; Mark Keane, B Foley, D O’Neill.
Subs: B Slattery for C O’Neill (20), A Owens for R O’Neill (51), C Carbery for J Butler (61).
Referee: Trevor Mann (Ballybrown).